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Missing Title
American Mathematics Competitions
2005 AMC 10 A Results for Florida
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 2098
Number of unofficial participants: 7
Average score of participants: 71.8
Average score for female students is: 69.0 ( 938 Students)
Average score for male students is: 74.7 ( 962 Students)
Average score for unspecified gender is 70.9 ( 198 Students)
Average score for grade 10 is: 73.4 ( 1127 Students)
Average score for grade 9 is: 70.0 ( 865 Students)
Average score for grade 8 and below is: 79.0 ( 24 Students)
Average score with unknown grade: 66.7 ( 82 Students)
AIME qualifying score = 120.0 or better
Number of AIME qualifers 23
Number of schools returning results 84
Average school winning score 102.20
American Mathematics Competitions
2005 AMC 12 A Results for Florida
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 2633
Number of unofficial participants: 0
Average score of participants: 78.4
Average score for female students is: 74.4 ( 1040 Students)
Average score for male students is: 82.0 ( 1298 Students)
Average score for unspecified gender is 76.5 ( 295 Students)
Average score for grade 13 is: 74.8 ( 4 Students)
Average score for grade 12 is: 80.5 ( 1135 Students)
Average score for grade 11 is: 76.3 ( 1241 Students)
Average score for grade 10 is: 79.9 ( 105 Students)
Average score for grade 9 is: 78.8 ( 18 Students)
Average score with unknown grade: 78.8 ( 130 Students)
AIME qualifying score = 100.0 or better
Number of AIME qualifers 286
Number of schools returning results 98
Average school winning score 105.96
Average school team score 296.50
American Mathematics Competitions
2005 AMC 10 B Results for Florida
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 635
Number of unofficial participants: 0
Average score of participants: 75.1
Average score for female students is: 70.9 ( 271 Students)
Average score for male students is: 77.8 ( 336 Students)
Average score for unspecified gender is 83.5 ( 28 Students)
Average score for grade 10 is: 77.3 ( 337 Students)
Average score for grade 9 is: 71.3 ( 260 Students)
Average score for grade 8 and below is: 85.7 ( 26 Students)
Average score with unknown grade: 73.4 ( 12 Students)
AIME qualifying score = 120.0 or better
Number of AIME qualifers 9
Number of schools returning results 35
Average school winning score 105.39
American Mathematics Competitions
2005 AMC 12 B Results for Florida
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 678
Number of unofficial participants: 0
Average score of participants: 84.1
Average score for female students is: 80.8 ( 267 Students)
Average score for male students is: 86.6 ( 382 Students)
Average score for unspecified gender is 82.1 ( 29 Students)
Average score for grade 12 is: 86.0 ( 318 Students)
Average score for grade 11 is: 82.0 ( 316 Students)
Average score for grade 10 is: 86.4 ( 27 Students)
Average score for grade 9 is: 93.0 ( 8 Students)
Average score for grade 8 and below is: 104.0 ( 1 Student)
Average score with unknown grade: 73.9 ( 8 Students)
AIME qualifying score = 100.0 or better
Number of AIME qualifers 116
Number of schools returning results 41
Average school winning score 110.20
Average school team score 297.26
2005 State AMC 12 TEAM Score Distribution
-----------------------------------------------
score A B Rank
-----------------------------------------------
423.0 1 1
390.0 1 2
389.0 1 3
384.0 1 4
381.5 1 5
381.0 2 6
379.0 1 8
369.0 1 9
365.5 1 10
363.0 1 11
362.5 1 12
356.5 1 13
355.5 1 14
350.5 1 1 15
349.5 1 17
349.0 2 18
347.0 1 20
346.5 1 21
344.5 1 22
343.5 1 23
342.0 1 24
340.0 1 25
337.5 1 26
336.5 1 27
336.0 1 28
333.5 2 29
333.0 1 1 31
329.5 1 33
327.0 1 34
326.5 1 35
326.0 1 36
324.5 1 37
324.0 1 38
322.5 1 39
322.0 1 40
321.0 1 41
319.0 1 1 42
318.0 1 44
316.5 1 45
315.5 1 46
314.5 1 47
314.0 1 1 48
313.0 1 50
312.5 1 51
312.0 1 52
311.0 2 53
309.5 2 1 55
308.5 1 58
307.5 1 59
307.0 1 60
306.5 1 61
305.0 1 62
304.5 1 63
304.0 2 1 64
303.0 1 67
301.5 1 68
301.0 1 69
298.0 1 70
297.5 1 71
297.0 1 72
296.0 1 73
294.0 1 74
293.5 2 75
293.0 1 77
292.0 1 78
291.5 1 79
291.0 1 80
290.5 1 81
288.0 1 82
287.0 1 83
286.0 1 84
285.5 1 85
285.0 1 86
284.5 1 87
284.0 1 88
283.5 1 89
282.0 1 90
280.0 2 91
278.0 1 93
276.5 1 94
273.0 1 95
272.0 1 96
271.5 1 1 97
271.0 3 99
269.5 1 102
269.0 1 103
268.0 1 104
267.5 1 105
267.0 1 106
265.5 1 107
264.5 1 1 108
263.5 1 110
262.0 1 111
261.0 1 112
260.5 1 113
256.0 2 114
255.5 3 116
255.0 1 119
253.0 1 120
251.0 1 121
249.0 1 122
248.0 1 123
243.0 1 124
242.0 1 125
239.5 1 126
238.5 1 127
235.5 1 128
235.0 1 129
233.5 1 130
230.0 1 131
229.0 1 132
215.5 1 133
214.0 1 134
205.5 1 135
196.5 1 136
194.0 1 137
119.5 1 138
114.5 1 139
2005 AMC Contest Score Distributions
-----------------------------------------------
score 12 A 12 B 10 A 10 B
-----------------------------------------------
150.0 1
146.5 1
144.0 2 1 2 1
143.0 2
139.5 1
138.0 1
137.0 1
136.0 2
134.5 1 1
133.5 1 2 1
132.5 2
132.0 1 2
131.0 2 2
130.0 3 3
129.0 3 1 1
127.5 1 1 2
126.5 1 1
126.0 1
125.5 4 1
125.0 2
124.0 2 1 1 1
123.0 1 1 2
122.5 3
122.0 1
121.5 1 1 4
120.5 1 3 1
119.5 10 1 3
119.0 1 1
118.5 2 1
118.0 1 6 1
117.0 4 3 2 1
116.5 1
116.0 3 1 3
115.5 2 3 1
115.0 5 1 1
114.5 2 2 4 1
113.5 5 1 5 2
113.0 1 1
112.5 7 6 4
112.0 3 1
111.5 5 5 1 3
111.0 2 1 2
110.5 1
110.0 8 4 7 3
109.5 1 1
109.0 14 6 2 1
108.5 3 1 2 2
108.0 12 4 3 5
107.5 9 2 9
107.0 1
106.5 6 4 4 3
106.0 1 1 2
105.5 21 3 3 3
105.0 3 1 4 2
104.5 26 2 3 3
104.0 12 10 7 2
103.5 3 1
103.0 18 6 8 5
102.5 2 1 1
102.0 28 9 9 3
101.5 3 4 2
101.0 34 13 4 3
100.5 13 4 10 4
100.0 1 1 1
99.5 21 11 6
99.0 1 1 5
98.5 26 13 11 6
98.0 7 4 7 3
97.5 18 2 4 1
97.0 17 4 6 7
96.5 1 1 1 1
96.0 23 13 19 5
95.5 3 1 5 3
95.0 50 21 8 4
94.5 7 4 8 3
94.0 19 6 5 2
93.5 24 11 17 8
93.0 1 2 3
92.5 32 14 11 7
92.0 8 1 11
91.5 22 8 13 2
91.0 16 5 12 7
90.5 15 5 10 2
90.0 39 10 14 8
89.5 8 1 7 5
89.0 69 21 19 1
88.5 11 5 5 10
88.0 41 8 20 4
87.5 13 13 14 9
87.0 16 6 9 2
86.5 39 9 22 14
86.0 2 1 8 5
85.5 43 13 24 4
85.0 7 7 14 10
84.5 34 11 16 4
84.0 27 14 18 9
83.5 19 13 5
83.0 62 17 21 7
82.5 10 1 11 5
82.0 55 7 22 6
81.5 16 9 20 5
81.0 34 5 21 7
80.5 43 15 15 7
80.0 16 4 16 2
79.5 38 13 25 6
79.0 12 7 13 6
78.5 43 8 29 6
78.0 30 14 31 8
77.5 34 3 19 3
77.0 58 12 28 6
76.5 22 3 12 1
76.0 43 6 31 4
75.5 9 4 17 10
75.0 31 7 34 5
74.5 27 13 22 6
74.0 37 2 31 5
73.5 36 3 34 4
73.0 11 2 14 10
72.5 45 3 27 5
72.0 20 7 17 7
71.5 38 21 8
71.0 51 9 21 6
70.5 28 4 18 8
70.0 34 3 32 1
69.5 14 9 10 10
69.0 36 5 38 6
68.5 18 5 31 8
68.0 28 3 23 5
67.5 31 7 35 5
67.0 15 4 24 4
66.5 30 28 3
66.0 26 1 20 10
65.5 31 6 24 3
65.0 42 5 22 6
64.5 20 6 21 5
64.0 20 4 31 7
63.5 13 2 15 5
63.0 29 3 18 6
62.5 16 1 24 10
62.0 17 3 15 6
61.5 23 5 27 2
61.0 18 5 16 6
60.5 21 1 17 4
60.0 28 2 20 5
59.5 16 4 18 2
59.0 19 3 17 2
58.5 7 2 15 4
58.0 14 2 16 3
57.5 10 17 3
57.0 12 1 16 8
56.5 12 4 22 3
56.0 6 2 25 5
55.5 6 1 22 3
55.0 7 8 3
54.5 7 15 5
54.0 18 4 19 3
53.5 9 1 15 6
53.0 6 2 16 2
52.5 5 17 3
52.0 5 12 2
51.5 9 1 11 7
51.0 7 1 4 2
50.5 6 4 10 2
50.0 2 1 12 6
49.5 7 4 9 5
49.0 4 5 3
48.5 2 1 11 4
48.0 9 3 14 3
47.5 8 1 11 1
47.0 3 13
46.5 4 5 1
46.0 8 6 2
45.5 2 6 2
45.0 4 1 3 4
44.5 3 2 5 6
44.0 1 3
43.5 1 1 5
43.0 4 4
42.5 2 7
42.0 11 3 17 2
41.5 3 3 1
41.0 2 3 2
40.5 2 8 1
40.0 1 3 2
39.5 1 1 2
39.0 3 1 3 2
38.5 1 7
38.0 7 2 5
37.5 1 3
37.0 3 3 1
36.5 3
36.0 7 1 12 4
35.5 2 1
35.0 1 1
34.5 3
34.0 3 1
33.5 1 1 1
33.0 1 2 1
32.5 3 2 1
32.0 2
31.5 1 2 1
31.0 1
30.5 2 1
30.0 4 7 3
29.5 1 1 2
29.0 2 4
28.0 1 1 1
26.5 1 1
25.5 1
24.0 3 4
23.0 2
22.0 1
20.5 1
19.5 1
18.0 2 3 4
16.0 1
14.5 1
13.5 1
American Mathematics Competitions
2005 AMC 10 A Results for Florida
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
150.0 125.0 100.0 1
149.5 124.5 99.5 3 3
149.0 124.0 1 99.0 4 1
148.5 123.5 98.5 7 4
148.0 123.0 1 98.0 5 2
147.5 122.5 3 97.5 4
147.0 122.0 97.0 3 3
146.5 121.5 2 1 96.5
146.0 121.0 96.0 9 8
145.5 120.5 1 95.5 4 1
145.0 120.0 95.0 5 3
144.5 119.5 2 1 94.5 6 1
144.0 2 119.0 1 94.0 3
143.5 118.5 93.5 13 4
143.0 118.0 4 2 93.0 1
142.5 117.5 92.5 4 5
142.0 117.0 1 1 92.0 6 1
141.5 116.5 91.5 6 7
141.0 116.0 2 1 91.0 8 4
140.5 115.5 3 90.5 4 4
140.0 115.0 1 90.0 9 4
139.5 114.5 2 2 89.5 3 3
139.0 114.0 89.0 13 4
138.5 113.5 4 1 88.5 2 3
138.0 1 113.0 88.0 9 10
137.5 112.5 2 2 87.5 6 7
137.0 112.0 1 2 87.0 6 3
136.5 111.5 86.5 15 5
136.0 111.0 2 86.0 7
135.5 110.5 1 85.5 14 8
135.0 110.0 6 1 85.0 10 2
134.5 1 109.5 84.5 8 7
134.0 109.0 2 84.0 8 8
133.5 108.5 1 83.5 4 8
133.0 108.0 3 83.0 10 10
132.5 107.5 5 3 82.5 7 4
132.0 1 107.0 82.0 14 7
131.5 106.5 3 1 81.5 13 4
131.0 1 106.0 1 81.0 13 6
130.5 105.5 1 1 80.5 6 8
130.0 105.0 3 1 80.0 8 7
129.5 104.5 1 2 79.5 11 12
129.0 1 104.0 5 2 79.0 5 7
128.5 103.5 2 1 78.5 16 13
128.0 103.0 5 2 78.0 13 15
127.5 2 102.5 77.5 9 7
127.0 102.0 4 4 77.0 14 12
126.5 1 101.5 1 3 76.5 8 3
126.0 101.0 1 2 76.0 13 17
125.5 100.5 5 5 75.5 7 7
American Mathematics Competitions
2005 AMC 10 A Results for Florida
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
75.0 12 17 50.0 2 10 25.0
74.5 8 13 49.5 5 4 24.5
74.0 13 16 49.0 2 3 24.0 2 2
73.5 13 17 48.5 8 3 23.5
73.0 4 9 48.0 4 6 23.0 2
72.5 11 14 47.5 6 5 22.5
72.0 7 10 47.0 7 4 22.0 1
71.5 7 11 46.5 4 21.5
71.0 9 11 46.0 4 1 21.0
70.5 6 9 45.5 2 2 20.5
70.0 13 12 45.0 3 20.0
69.5 5 4 44.5 2 2 19.5 1
69.0 14 18 44.0 1 2 19.0
68.5 14 17 43.5 1 3 18.5
68.0 10 9 43.0 1 3 18.0 1 3
67.5 17 14 42.5 3 2 17.5
67.0 7 12 42.0 7 7 17.0
66.5 8 16 41.5 2 1 16.5
66.0 7 11 41.0 2 1 16.0
65.5 10 12 40.5 2 3 15.5
65.0 8 11 40.0 1 1 15.0
64.5 6 13 39.5 1 14.5 1
64.0 6 23 39.0 1 2 14.0
63.5 6 9 38.5 3 4 13.5
63.0 5 7 38.0 2 13.0
62.5 6 16 37.5 2 1 12.5
62.0 7 8 37.0 2 1 12.0
61.5 9 15 36.5 1 1 11.5
61.0 6 7 36.0 7 5 11.0
60.5 5 9 35.5 1 10.5
60.0 11 9 35.0 1 10.0
59.5 8 6 34.5 1 1 9.5
59.0 6 10 34.0 2 1 9.0
58.5 8 4 33.5 1 8.5
58.0 6 10 33.0 2 8.0
57.5 5 11 32.5 1 7.5
57.0 5 11 32.0 2 7.0
56.5 10 9 31.5 2 6.5
56.0 7 16 31.0 6.0
55.5 10 9 30.5 1 5.5
55.0 5 3 30.0 3 4 5.0
54.5 9 6 29.5 1 4.5
54.0 10 9 29.0 3 1 4.0
53.5 8 6 28.5 3.5
53.0 5 6 28.0 1 3.0
52.5 10 6 27.5 2.5
52.0 4 7 27.0 2.0
51.5 4 7 26.5 1 1.5
51.0 1 3 26.0 1.0
50.5 2 7 25.5 1 .5
0.0 0 0
American Mathematics Competitions
2005 AMC 10 A Results for Florida
SCORE DISTRIBUTION
score -----------grade-----------
6 7 8 9 10 unknown
---------------------------
144.0 1 1
138.0 1
134.5 1
132.0 1 1
131.0 2
129.0 1
127.5 2
126.5 1
126.0 1
124.0 1
123.0 1
122.5 2 1
121.5 1 3
120.5 1
119.5 1 2
119.0 1
118.0 3 3
117.0 2
116.0 1 2
115.5 2 1
115.0 1
114.5 2 2
113.5 5
112.5 1 3
112.0 1 1 1
111.5 1
111.0 1 1
110.5 1
110.0 2 5
109.0 2
108.5 1 1
108.0 1 2
107.5 1 8
106.5 1 3
106.0 1
105.5 1 2
105.0 1 3
104.5 1 2
104.0 3 4
103.5 3
103.0 4 4
102.0 2 7
101.5 4
101.0 1 3
100.5 1 4 5
100.0 1
99.5 2 3 1
99.0 2 2 1
98.5 7 4
98.0 5 2
97.5 2 2
97.0 3 3
96.5 1
96.0 1 8 10
95.5 1 4
95.0 3 5
94.5 3 5
94.0 2 2 1
93.5 2 14 1
93.0 1 1
92.5 5 4 2
92.0 5 5 1
91.5 4 9
91.0 4 8
90.5 7 3
90.0 5 9
89.5 1 6
89.0 1 6 12
88.5 1 4
88.0 1 8 11
87.5 5 8 1
87.0 2 7
86.5 1 8 12 1
86.0 1 7
85.5 1 10 13
85.0 4 9 1
84.5 9 6 1
84.0 4 14
83.5 4 9
83.0 1 8 12
82.5 6 5
82.0 10 11 1
81.5 9 10 1
81.0 6 14 1
80.5 8 7
80.0 1 8 7
79.5 10 13 2
79.0 8 5
78.5 7 21 1
78.0 12 18 1
77.5 7 10 2
77.0 9 18 1
76.5 6 6
76.0 16 14 1
75.5 5 11 1
75.0 12 21 1
74.5 6 16
74.0 18 12 1
73.5 1 12 17 4
73.0 3 11
72.5 15 12
72.0 7 10
71.5 10 10 1
71.0 10 11
70.5 7 10 1
70.0 12 18 2
69.5 4 6
69.0 2 16 18 2
68.5 16 15
68.0 10 12 1
67.5 1 13 19 2
67.0 9 13 2
66.5 13 15
66.0 6 12 2
65.5 1 11 9 3
65.0 5 17
64.5 1 10 10
64.0 1 16 14
63.5 8 6 1
63.0 6 11 1
62.5 12 12
62.0 1 7 7
61.5 11 13 3
61.0 7 9
60.5 10 6 1
60.0 7 13
59.5 1 4 10 3
59.0 9 8
58.5 5 10
58.0 6 10
57.5 6 11
57.0 7 9
56.5 11 10 1
56.0 10 14 1
55.5 10 10 2
55.0 3 5
54.5 10 5
54.0 7 12
53.5 6 8 1
53.0 1 6 7 2
52.5 8 8 1
52.0 7 4 1
51.5 1 7 3
51.0 2 2
50.5 3 6 1
50.0 4 7 1
49.5 6 3
49.0 3 2
48.5 5 6
48.0 7 5 2
47.5 3 7 1
47.0 6 6 1
46.5 1 4
46.0 5 1
45.5 3 3
45.0 2 1
44.5 1 3 1
44.0 1 1 1
43.5 1 3 1
43.0 4
42.5 3 4
42.0 9 6 2
41.5 1 2
41.0 2 1
40.5 3 3 2
40.0 2 1
39.5 1
39.0 2 1
38.5 1 4 2
38.0 2
37.5 1 2
37.0 2 1
36.5 1 1 1
36.0 5 7
35.5 1
35.0 1
34.5 2 1
34.0 2 1
33.5 1
33.0 2
32.5 1
32.0 2
31.5 2
30.5 1
30.0 3 4
29.5 1
29.0 3 1
28.0 1
26.5 1
25.5 1
24.0 4
23.0 2
22.0 1
19.5 1
18.0 3 1
14.5 1
American Mathematics Competitions
2005 AMC 10 A Results for Florida
Analysis
Table of Item Difficulty for the 2005
American High School Mathematics Examination
Tabulation of responses for all Participants
Percent of Responses
ITEM A B C D E OMITS ?
____ _____ _____ _____ _____ _____ _____ _____
1 0.25 0.11 0.29 8.65* 0.36 0.34 0.00
2 0.19 0.11 5.67* 0.05 1.62 2.35 0.00
3 0.03 8.90* 0.31 0.42 0.07 0.27 0.00
4 0.49 1.82* 1.94 0.71 0.45 4.59 0.00
5 5.82* 0.41 3.45 0.13 0.06 0.13 0.00
6 0.24 4.30* 3.62 0.16 0.10 1.56 0.00
7 0.83 3.50* 0.41 0.44 0.83 3.98 0.00
8 1.22 0.32 3.88* 0.14 0.17 4.27 0.00
9 1.25 4.90* 1.34 0.25 0.25 2.00 0.00
10 1.62* 0.42 1.07 0.37 0.15 6.37 0.00
11 0.56 1.94* 0.30 0.80 0.13 6.27 0.00
12 0.39 1.22* 0.66 0.27 0.63 6.84 0.00
13 1.49 0.53 0.44 0.39 0.89* 6.27 0.00
14 0.63 0.62 0.40 0.46 1.99* 5.90 0.00
15 0.53 0.92 0.90 1.21 1.22* 5.23 0.00
16 0.66 0.42 0.75 1.97* 0.17 6.04 0.00
17 0.41 0.35 0.53 2.04* 0.41 6.27 0.00
18 1.51* 1.80 1.12 2.88 0.37 2.32 0.00
19 0.43 0.77 0.75 3.15* 0.58 4.31 0.00
20 0.59* 0.38 0.61 0.46 0.31 7.65 0.00
21 1.80 0.71* 0.28 0.26 0.63 6.32 0.00
22 0.72 0.46 0.28 2.12* 0.49 5.93 0.00
23 0.20 0.56 1.18* 1.05 0.65 6.35 0.00
24 0.95 0.82* 0.40 0.16 0.16 7.52 0.00
25 0.38 0.62 0.94 0.89* 0.13 7.04 0.00
(*) Correct Response
(?) Response the computer was unable to read due to incomplete
erasures or two answers marked in the same column
American Mathematics Competitions
2005 AMC 12 A Results for Florida
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
150.0 125.0 2 100.0 1
149.5 124.5 99.5 14 6
149.0 124.0 2 99.0 1
148.5 123.5 98.5 22 3
148.0 123.0 98.0 3 2
147.5 122.5 97.5 8 8
147.0 122.0 1 97.0 10 5
146.5 121.5 1 96.5 1
146.0 121.0 96.0 16 4
145.5 120.5 1 95.5 1 1
145.0 120.0 95.0 30 15
144.5 119.5 8 1 94.5 7
144.0 2 119.0 94.0 10 9
143.5 118.5 1 1 93.5 15 5
143.0 2 118.0 93.0 1
142.5 117.5 92.5 19 12
142.0 117.0 3 92.0 4 4
141.5 116.5 91.5 12 8
141.0 116.0 3 91.0 6 6
140.5 115.5 90.5 5 4
140.0 115.0 5 90.0 22 9
139.5 114.5 2 89.5 4 1
139.0 114.0 89.0 41 24
138.5 113.5 3 1 88.5 6 4
138.0 113.0 88.0 22 18
137.5 112.5 6 87.5 4 5
137.0 112.0 87.0 7 9
136.5 111.5 4 1 86.5 25 14
136.0 111.0 2 86.0 1
135.5 110.5 85.5 26 13
135.0 110.0 6 1 85.0 5
134.5 109.5 84.5 18 13
134.0 109.0 12 1 84.0 16 10
133.5 1 108.5 3 83.5 8 9
133.0 108.0 6 4 83.0 35 23
132.5 2 107.5 7 2 82.5 5 4
132.0 1 107.0 82.0 27 22
131.5 106.5 2 3 81.5 13 2
131.0 106.0 81.0 10 18
130.5 105.5 16 4 80.5 22 16
130.0 3 105.0 2 80.0 6 4
129.5 104.5 14 11 79.5 17 16
129.0 2 1 104.0 7 4 79.0 5 3
128.5 103.5 78.5 18 21
128.0 103.0 11 4 78.0 17 10
127.5 1 102.5 2 77.5 17 12
127.0 102.0 21 3 77.0 27 29
126.5 1 101.5 2 76.5 9 8
126.0 101.0 20 13 76.0 20 18
125.5 2 1 100.5 9 3 75.5 2 6
American Mathematics Competitions
2005 AMC 12 A Results for Florida
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
75.0 13 13 50.0 2 25.0
74.5 10 16 49.5 3 4 24.5
74.0 19 16 49.0 1 3 24.0 2 1
73.5 16 15 48.5 1 23.5
73.0 6 4 48.0 6 3 23.0
72.5 17 24 47.5 2 4 22.5
72.0 11 7 47.0 1 1 22.0
71.5 18 16 46.5 1 3 21.5
71.0 23 23 46.0 3 3 21.0
70.5 9 15 45.5 20.5
70.0 19 14 45.0 1 3 20.0
69.5 8 4 44.5 1 1 19.5
69.0 12 19 44.0 1 19.0
68.5 8 7 43.5 1 18.5
68.0 5 18 43.0 1 2 18.0 1
67.5 13 14 42.5 2 17.5
67.0 7 7 42.0 2 7 17.0
66.5 17 9 41.5 2 1 16.5
66.0 10 10 41.0 1 16.0
65.5 13 14 40.5 1 15.5
65.0 19 20 40.0 1 15.0
64.5 9 6 39.5 14.5
64.0 4 14 39.0 1 14.0
63.5 7 4 38.5 1 13.5
63.0 7 17 38.0 6 1 13.0
62.5 4 11 37.5 12.5
62.0 6 10 37.0 2 12.0
61.5 10 11 36.5 11.5
61.0 7 6 36.0 1 6 11.0
60.5 9 9 35.5 2 10.5
60.0 13 11 35.0 1 10.0
59.5 6 9 34.5 9.5
59.0 9 8 34.0 9.0
58.5 1 5 33.5 1 8.5
58.0 4 8 33.0 1 8.0
57.5 5 4 32.5 2 1 7.5
57.0 7 4 32.0 7.0
56.5 8 4 31.5 1 6.5
56.0 1 4 31.0 1 6.0
55.5 2 4 30.5 5.5
55.0 1 5 30.0 1 3 5.0
54.5 1 5 29.5 1 4.5
54.0 5 7 29.0 2 4.0
53.5 3 5 28.5 3.5
53.0 1 5 28.0 1 3.0
52.5 2 3 27.5 2.5
52.0 1 4 27.0 2.0
51.5 2 6 26.5 1 1.5
51.0 4 3 26.0 1.0
50.5 3 2 25.5 .5
0.0 0 0
American Mathematics Competitions
2005 AMC 12 A Results for Florida
SCORE DISTRIBUTION
score -----------grade-----------
6 7 8 9 10 11 12 13 unknown
---------------------------
146.5 1
144.0 1 1
143.0 2
133.5 1
132.5 1 1
132.0 1
130.0 3
129.0 1 2
127.5 1
126.5 1
125.5 3 1
125.0 2
124.0 1 1
122.0 1
121.5 1
120.5 1
119.5 2 1 7
118.5 2
117.0 1 1 2
116.0 1 2
115.0 2 3
114.5 1 1
113.5 2 2 1
112.5 1 2 4
111.5 1 4
111.0 2
110.0 2 5 1
109.0 6 8
108.5 1 2
108.0 5 5 2
107.5 5 4
106.5 3 2 1
105.5 2 7 11 1
105.0 2 1
104.5 1 1 8 15 1
104.0 5 6 1
103.0 11 7
102.5 1 1
102.0 2 10 13 3
101.5 2 1
101.0 1 13 19 1
100.5 10 3
100.0 1
99.5 1 10 9 1
99.0 1
98.5 1 14 11
98.0 2 4 1
97.5 1 1 6 8 2
97.0 1 1 4 9 2
96.5 1
96.0 1 12 8 2
95.5 2 1
95.0 3 17 28 1 1
94.5 4 3
94.0 6 13
93.5 1 11 11 1
93.0 1
92.5 1 2 13 16
92.0 2 5 1
91.5 1 11 9 1
91.0 6 8 2
90.5 7 5 3
90.0 1 15 17 6
89.5 3 2 3
89.0 1 26 41 1
88.5 3 8
88.0 1 19 20 1
87.5 7 6
87.0 1 8 7
86.5 3 15 20 1
86.0 1 1
85.5 1 23 19
85.0 2 5
84.5 2 19 13
84.0 15 12
83.5 2 6 10 1
83.0 3 26 29 4
82.5 5 5
82.0 22 29 4
81.5 9 6 1
81.0 1 17 15 1
80.5 1 3 21 16 2
80.0 6 8 2
79.5 1 16 18 3
79.0 5 5 2
78.5 22 20 1
78.0 3 12 13 1 1
77.5 3 18 12 1
77.0 5 28 24 1
76.5 14 7 1
76.0 6 15 19 3
75.5 5 3 1
75.0 2 17 10 2
74.5 1 1 19 5 1
74.0 1 1 19 14 2
73.5 1 18 14 3
73.0 6 5
72.5 1 2 21 18 3
72.0 12 8
71.5 1 20 16 1
71.0 1 2 21 26 1
70.5 17 11
70.0 1 1 16 15 1
69.5 1 5 6 2
69.0 4 17 12 1 2
68.5 1 9 8
68.0 18 5 5
67.5 1 3 21 5 1
67.0 2 6 7
66.5 21 8 1
66.0 2 11 9 4
65.5 10 18 3
65.0 2 25 14 1
64.5 1 9 8 2
64.0 1 12 7
63.5 8 4 1
63.0 18 8 3
62.5 1 8 6 1
62.0 10 7
61.5 3 11 8 1
61.0 7 10 1
60.5 1 11 9
60.0 1 1 12 12 2
59.5 9 7
59.0 9 8 2
58.5 1 3 3
58.0 1 7 5 1
57.5 4 5 1
57.0 7 4 1
56.5 1 9 2
56.0 6
55.5 5 1
55.0 1 6
54.5 5 2
54.0 9 7 2
53.5 1 7 1
53.0 6
52.5 1 1 3
52.0 3 2
51.5 5 4
51.0 2 5
50.5 1 4 1
50.0 2
49.5 4 3
49.0 2 2
48.5 1 1
48.0 7 2
47.5 5 3
47.0 1 1 1
46.5 1 3
46.0 1 5 1 1
45.5 1 1
45.0 1 3
44.5 1 2
44.0 1
43.5 1
43.0 1 2 1
42.5 2
42.0 5 6
41.5 3
41.0 2
40.5 1 1
40.0 1
39.0 1 1 1
38.5 1
38.0 1 3 3
37.0 1 2
36.0 2 5
35.5 2
35.0 1
33.5 1
33.0 1
32.5 3
31.5 1
31.0 1
30.0 4
29.5 1
29.0 2
28.0 1
26.5 1
24.0 2 1
18.0 1 1
American Mathematics Competitions
2005 AMC 12 A Results for Florida
Analysis
Table of Item Difficulty for the 2005
American High School Mathematics Examination
Tabulation of responses for all Participants
Percent of Responses
ITEM A B C D E OMITS ?
____ _____ _____ _____ _____ _____ _____ _____
1 0.05 0.06 0.09 9.46* 0.12 0.22 0.00
2 0.02 9.40* 0.16 0.28 0.03 0.11 0.00
3 0.36 4.24* 1.06 0.54 0.44 3.36 0.00
4 6.90* 0.36 2.50 0.06 0.05 0.12 0.00
5 0.25 6.83* 1.86 0.09 0.05 0.92 0.00
6 0.54 4.87* 0.25 0.27 0.68 3.38 0.00
7 0.54 0.17 7.08* 0.08 0.10 2.03 0.00
8 0.39 0.46 0.32 2.20* 0.22 6.41 0.00
9 3.35* 0.38 0.81 0.28 0.15 5.03 0.00
10 0.39 2.72* 0.20 0.62 0.07 6.00 0.00
11 0.85 0.36 0.42 0.43 3.14* 4.80 0.00
12 1.07 0.31 0.17 3.26* 1.28 3.90 0.00
13 0.16 0.20 0.43 2.84* 0.32 6.05 0.00
14 0.27 0.41 3.01 0.83* 0.30 5.18 0.00
15 0.24 0.32 1.24* 0.82 0.81 6.57 0.00
16 0.30 0.36 0.93 0.52* 0.33 7.56 0.00
17 1.56* 0.87 1.00 0.35 0.32 5.91 0.00
18 0.36* 0.33 0.31 0.28 0.21 8.50 0.01
19 0.87 2.07* 0.93 0.44 0.76 4.93 0.00
20 0.33 0.13 0.17 0.14 0.18* 9.05 0.00
21 0.37 0.40 0.50* 0.21 0.04 8.49 0.00
22 0.36 0.53* 0.25 0.21 0.19 8.44 0.00
23 0.42 0.55* 0.24 0.19 0.47 8.14 0.00
24 0.08 0.17* 0.16 0.18 0.08 9.32 0.00
25 0.28 0.23 0.22* 0.16 0.06 9.04 0.00
(*) Correct Response
(?) Response the computer was unable to read due to incomplete
erasures or two answers marked in the same column
American Mathematics Competitions
2005 AMC 10 B Results for Florida
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
150.0 1 125.0 100.0 1
149.5 124.5 99.5
149.0 124.0 1 99.0
148.5 123.5 98.5 3 3
148.0 123.0 2 98.0 1
147.5 122.5 97.5 1
147.0 122.0 97.0 3 4
146.5 121.5 96.5 1
146.0 121.0 96.0 3 2
145.5 120.5 95.5 2 1
145.0 120.0 95.0 2 2
144.5 119.5 94.5 3
144.0 1 119.0 1 94.0 1
143.5 118.5 1 93.5 3 5
143.0 118.0 1 93.0 3
142.5 117.5 92.5 5 2
142.0 117.0 1 92.0
141.5 116.5 91.5 1 1
141.0 116.0 91.0 3 3
140.5 115.5 90.5 2
140.0 115.0 90.0 5 3
139.5 114.5 1 89.5 3 1
139.0 114.0 89.0 1
138.5 113.5 2 88.5 7 2
138.0 113.0 1 88.0 3 1
137.5 112.5 87.5 5 4
137.0 1 112.0 1 87.0 1 1
136.5 111.5 2 86.5 8 6
136.0 111.0 86.0 2 3
135.5 110.5 85.5 1 3
135.0 110.0 1 1 85.0 6 4
134.5 109.5 1 84.5 4
134.0 109.0 1 84.0 4 2
133.5 1 108.5 1 1 83.5 3 2
133.0 108.0 4 1 83.0 1 6
132.5 107.5 82.5 1 3
132.0 107.0 1 82.0 4 2
131.5 106.5 3 81.5 3 1
131.0 1 1 106.0 1 81.0 4 3
130.5 105.5 2 1 80.5 5 2
130.0 105.0 2 80.0 1 1
129.5 104.5 2 1 79.5 4 2
129.0 104.0 2 79.0 3 3
128.5 103.5 1 78.5 2 4
128.0 103.0 1 4 78.0 2 6
127.5 102.5 1 77.5 3
127.0 102.0 1 2 77.0 3 3
126.5 101.5 2 76.5 1
126.0 101.0 1 76.0 1 3
125.5 100.5 2 2 75.5 8 2
American Mathematics Competitions
2005 AMC 10 B Results for Florida
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
75.0 4 1 50.0 4 2 25.0
74.5 2 4 49.5 1 3 24.5
74.0 1 4 49.0 1 2 24.0
73.5 2 2 48.5 2 2 23.5
73.0 5 5 48.0 3 23.0
72.5 2 1 47.5 1 22.5
72.0 5 2 47.0 22.0
71.5 4 4 46.5 1 21.5
71.0 4 2 46.0 1 1 21.0
70.5 4 3 45.5 2 20.5 1
70.0 1 45.0 2 2 20.0
69.5 6 4 44.5 2 4 19.5
69.0 4 2 44.0 19.0
68.5 7 1 43.5 18.5
68.0 2 3 43.0 18.0
67.5 2 3 42.5 17.5
67.0 4 42.0 1 1 17.0
66.5 2 1 41.5 1 16.5
66.0 3 7 41.0 2 16.0 1
65.5 3 40.5 1 15.5
65.0 3 3 40.0 2 15.0
64.5 3 2 39.5 2 14.5
64.0 2 4 39.0 2 14.0
63.5 3 2 38.5 13.5 1
63.0 4 2 38.0 1 3 13.0
62.5 4 5 37.5 12.5
62.0 3 3 37.0 1 12.0
61.5 1 1 36.5 11.5
61.0 2 4 36.0 4 11.0
60.5 2 2 35.5 10.5
60.0 3 2 35.0 10.0
59.5 2 34.5 9.5
59.0 2 34.0 1 9.0
58.5 2 1 33.5 1 8.5
58.0 2 1 33.0 1 8.0
57.5 2 1 32.5 7.5
57.0 4 3 32.0 7.0
56.5 2 1 31.5 1 6.5
56.0 3 2 31.0 6.0
55.5 2 30.5 5.5
55.0 2 1 30.0 1 2 5.0
54.5 3 2 29.5 2 4.5
54.0 1 2 29.0 4.0
53.5 2 4 28.5 3.5
53.0 2 28.0 1 3.0
52.5 2 1 27.5 2.5
52.0 1 1 27.0 2.0
51.5 4 3 26.5 1.5
51.0 2 26.0 1.0
50.5 1 1 25.5 .5
0.0 0 0
American Mathematics Competitions
2005 AMC 10 B Results for Florida
SCORE DISTRIBUTION
score -----------grade-----------
6 7 8 9 10 unknown
---------------------------
150.0 1
144.0 1
137.0 1
133.5 1
131.0 1 1
124.0 1
123.0 2
119.0 1
118.5 1
118.0 1
117.0 1
116.5 1
115.5 1
114.5 1
113.5 2
113.0 1
112.0 1
111.5 2 1
110.0 1 2
109.5 1
109.0 1
108.5 2
108.0 1 4
107.0 1
106.5 1 2
106.0 1 1
105.5 3
105.0 1 1
104.5 2 1
104.0 2
103.5 1
103.0 1 4
102.5 1
102.0 1 2
101.5 2
101.0 2 1
100.5 4
100.0 1
98.5 1 2 3
98.0 1 1 1
97.5 1
97.0 3 4
96.5 1
96.0 1 1 3
95.5 1 2
95.0 4
94.5 1 2
94.0 1 1
93.5 4 4
93.0 1 1 1
92.5 2 2 3
91.5 2
91.0 2 5
90.5 2
90.0 1 7
89.5 2 2 1
89.0 1
88.5 2 8
88.0 2 2
87.5 5 4
87.0 1 1
86.5 1 2 6 5
86.0 3 2
85.5 2 2
85.0 2 8
84.5 1 3
84.0 2 7
83.5 1 2 2
83.0 1 3 3
82.5 1 1 1 2
82.0 1 1 1 3
81.5 2 3
81.0 2 5
80.5 3 4
80.0 1 1
79.5 2 4
79.0 2 4
78.5 3 3
78.0 4 4
77.5 2 1
77.0 1 1 4
76.5 1
76.0 1 2 1
75.5 5 4 1
75.0 1 4
74.5 2 4
74.0 3 2
73.5 2 2
73.0 4 6
72.5 2 3
72.0 1 2 4
71.5 4 4
71.0 2 4
70.5 1 5 2
70.0 1
69.5 7 3
69.0 5 1
68.5 3 5
68.0 1 3 1
67.5 1 2 2
67.0 1 3
66.5 3
66.0 5 5
65.5 2 1
65.0 2 4
64.5 3 2
64.0 3 3 1
63.5 3 2
63.0 2 4
62.5 3 7
62.0 1 5
61.5 1 1
61.0 3 3
60.5 4
60.0 1 3 1
59.5 1 1
59.0 2
58.5 1 2 1
58.0 1 2
57.5 3
57.0 2 6
56.5 1 2
56.0 1 4
55.5 2 1
55.0 2 1
54.5 4 1
54.0 1 2
53.5 3 3
53.0 2
52.5 3
52.0 1 1
51.5 5 2
51.0 2
50.5 2
50.0 1 4 1
49.5 3 2
49.0 3
48.5 3 1
48.0 2 1
47.5 1
46.5 1
46.0 2
45.5 1 1
45.0 3 1
44.5 4 2
42.0 2
41.5 1
41.0 2
40.5 1
40.0 1 1
39.5 2
39.0 1 1
38.0 1 3 1
37.0 1
36.0 2 2
34.0 1
33.5 1
33.0 1
31.5 1
30.0 1 2
29.5 2
28.0 1
20.5 1
16.0 1
13.5 1
American Mathematics Competitions
2005 AMC 10 B Results for Florida
Analysis
Table of Item Difficulty for the 2005
American High School Mathematics Examination
Tabulation of responses for all Participants
Percent of Responses
ITEM A B C D E OMITS ?
____ _____ _____ _____ _____ _____ _____ _____
1 7.97* 0.39 0.54 0.27 0.65 0.17 0.02
2 0.20 0.25 0.08 8.27* 0.43 0.77 0.00
3 0.03 0.71 2.85 5.10* 0.71 0.60 0.00
4 1.06 0.05 0.76 4.66* 0.22 3.26 0.00
5 0.17 0.17 8.24* 0.35 0.47 0.60 0.00
6 0.22 7.97* 0.25 0.30 0.36 0.88 0.02
7 0.94 1.53* 0.38 1.17 0.68 5.31 0.00
8 5.83* 0.14 1.29 0.13 0.13 2.49 0.00
9 0.36 0.52 2.17 4.65* 0.72 1.57 0.00
10 1.15* 0.98 0.65 0.41 0.24 6.58 0.00
11 0.36 0.50 0.19 2.03 1.94* 4.96 0.02
12 0.58 1.73 0.46 0.31 0.39* 6.50 0.02
13 0.46 0.61 1.70* 1.45 0.60 5.17 0.02
14 0.61 0.27 1.75* 1.97 0.63 4.76 0.02
15 1.73 0.54 0.82 3.83* 0.50 2.57 0.02
16 0.44 0.65 0.76 0.61* 0.09 7.43 0.02
17 0.74 2.63* 1.12 0.35 0.24 4.91 0.02
18 0.54 4.71 0.94 1.76* 0.58 1.46 0.00
19 0.63 5.56* 0.61 0.49 0.49 2.22 0.00
20 0.77 0.36 0.98* 0.43 0.28 7.18 0.00
21 0.27* 0.41 0.44 0.46 0.27 8.16 0.00
22 0.77 0.99 0.49* 0.41 0.36 6.98 0.00
23 2.57 0.68 0.54* 0.33 0.20 5.69 0.00
24 0.55 0.25 0.31 0.44 1.28* 7.17 0.00
25 0.43 0.35 3.20* 0.17 0.16 5.70 0.00
(*) Correct Response
(?) Response the computer was unable to read due to incomplete
erasures or two answers marked in the same column
American Mathematics Competitions
2005 AMC 12 B Results for Florida
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
150.0 125.0 100.0
149.5 124.5 99.5 7 4
149.0 124.0 1 99.0 1
148.5 123.5 98.5 10 2
148.0 123.0 1 98.0 1 2
147.5 122.5 97.5 1 1
147.0 122.0 97.0 4
146.5 121.5 1 96.5 1
146.0 121.0 96.0 5 7
145.5 120.5 2 95.5 1
145.0 120.0 95.0 10 10
144.5 119.5 1 94.5 2 2
144.0 1 119.0 94.0 3 3
143.5 118.5 93.5 5 5
143.0 118.0 1 93.0
142.5 117.5 92.5 8 5
142.0 117.0 3 92.0 1
141.5 116.5 91.5 3 5
141.0 116.0 1 91.0 5
140.5 115.5 2 90.5 3 1
140.0 115.0 1 90.0 5 4
139.5 1 114.5 2 89.5 1
139.0 114.0 89.0 15 5
138.5 113.5 1 88.5 3 2
138.0 113.0 1 88.0 2 6
137.5 112.5 3 3 87.5 5 7
137.0 112.0 87.0 4 2
136.5 111.5 3 1 86.5 4 3
136.0 2 111.0 1 86.0 1
135.5 110.5 85.5 7 6
135.0 110.0 3 1 85.0 6 1
134.5 1 109.5 1 84.5 4 7
134.0 109.0 6 84.0 6 7
133.5 2 108.5 1 83.5
133.0 108.0 1 3 83.0 12 5
132.5 107.5 1 1 82.5 1
132.0 107.0 82.0 3 4
131.5 106.5 3 1 81.5 5 4
131.0 106.0 1 81.0 3 2
130.5 105.5 2 1 80.5 4 11
130.0 3 105.0 1 80.0 4
129.5 104.5 2 79.5 9 4
129.0 1 104.0 6 4 79.0 3 4
128.5 103.5 78.5 3 4
128.0 103.0 5 1 78.0 11 3
127.5 1 102.5 1 77.5 2 1
127.0 102.0 8 1 77.0 4 8
126.5 101.5 76.5 1 2
126.0 101.0 7 5 76.0 3 3
125.5 1 100.5 3 75.5 2 2
American Mathematics Competitions
2005 AMC 12 B Results for Florida
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
75.0 3 3 50.0 1 25.0
74.5 8 4 49.5 3 1 24.5
74.0 1 1 49.0 24.0
73.5 1 2 48.5 1 23.5
73.0 1 1 48.0 3 23.0
72.5 1 2 47.5 1 22.5
72.0 4 2 47.0 22.0
71.5 46.5 21.5
71.0 5 4 46.0 21.0
70.5 3 1 45.5 20.5
70.0 3 45.0 1 20.0
69.5 6 3 44.5 1 1 19.5
69.0 2 3 44.0 19.0
68.5 1 4 43.5 1 18.5
68.0 2 1 43.0 18.0 1 2
67.5 1 5 42.5 17.5
67.0 2 2 42.0 1 1 17.0
66.5 41.5 16.5
66.0 1 41.0 16.0
65.5 4 1 40.5 15.5
65.0 2 3 40.0 15.0
64.5 3 3 39.5 1 14.5
64.0 1 3 39.0 1 14.0
63.5 1 1 38.5 13.5
63.0 2 38.0 13.0
62.5 1 37.5 1 12.5
62.0 2 1 37.0 12.0
61.5 3 1 36.5 11.5
61.0 2 3 36.0 1 11.0
60.5 1 35.5 10.5
60.0 1 1 35.0 10.0
59.5 1 2 34.5 9.5
59.0 3 34.0 9.0
58.5 2 33.5 8.5
58.0 1 1 33.0 8.0
57.5 32.5 1 1 7.5
57.0 1 32.0 7.0
56.5 4 31.5 6.5
56.0 1 1 31.0 6.0
55.5 1 30.5 1 1 5.5
55.0 30.0 5.0
54.5 29.5 4.5
54.0 1 3 29.0 4.0
53.5 1 28.5 3.5
53.0 2 28.0 3.0
52.5 27.5 2.5
52.0 27.0 2.0
51.5 1 26.5 1.5
51.0 1 26.0 1.0
50.5 1 1 25.5 .5
0.0 0 0
American Mathematics Competitions
2005 AMC 12 B Results for Florida
SCORE DISTRIBUTION
score -----------grade-----------
6 7 8 9 10 11 12 13 unknown
---------------------------
144.0 1
139.5 1
136.0 2
134.5 1
133.5 1 1
130.0 1 2
129.0 1
127.5 1
125.5 1
124.0 1
123.0 1
121.5 1
120.5 1 1 1
119.5 1
118.0 1
117.0 2 1
116.0 1
115.5 2
115.0 1
114.5 1 1
113.5 1
113.0 1
112.5 1 2 3
111.5 1 4
111.0 1
110.0 1 1 2
109.5 1
109.0 3 3
108.5 1
108.0 1 1 2
107.5 1 1
106.5 4
106.0 1
105.5 1 2
105.0 1
104.5 2
104.0 1 3 6
103.0 3 3
102.5 1
102.0 3 6
101.0 1 5 7
100.5 3 1
99.5 1 6 4
99.0 1
98.5 1 3 9
98.0 1 2 1
97.5 1 1
97.0 3 1
96.5 1
96.0 2 5 5 1
95.5 1
95.0 1 9 11
94.5 2 2
94.0 1 4 1
93.5 5 5 1
92.5 1 7 6
92.0 1
91.5 1 4 3
91.0 3 2
90.5 3 2
90.0 3 7
89.5 1
89.0 7 14
88.5 1 3 1
88.0 4 4
87.5 5 8
87.0 2 4
86.5 6 3
86.0 1
85.5 2 3 8
85.0 3 4
84.5 1 7 3
84.0 1 1 7 5
83.0 1 10 6
82.5 1
82.0 1 2 4
81.5 6 3
81.0 1 4
80.5 1 9 5
80.0 3 1
79.5 6 7
79.0 5 2
78.5 4 4
78.0 9 5
77.5 2 1
77.0 3 4 5
76.5 1 2
76.0 1 3 2
75.5 3 1
75.0 1 2 4
74.5 1 6 6
74.0 1 1
73.5 1 2
73.0 2
72.5 3
72.0 1 5 1
71.0 5 3 1
70.5 2 2
70.0 3
69.5 6 3
69.0 3 2
68.5 2 3
68.0 3
67.5 5 2
67.0 1 3
66.0 1
65.5 2 4
65.0 1 2 2
64.5 2 4
64.0 1 3
63.5 2
63.0 1 1 1
62.5 1
62.0 1 2
61.5 3 2
61.0 3 2
60.5 1
60.0 1 1
59.5 2 1 1
59.0 3
58.5 2
58.0 1 1
57.0 1
56.5 3 1
56.0 2
55.5 1
54.0 1 2 1
53.5 1
53.0 2
51.5 1
51.0 1
50.5 4
50.0 1
49.5 2 2
48.5 1
48.0 1 2
47.5 1
45.0 1
44.5 1 1
43.5 1
42.0 2 1
39.5 1
39.0 1
37.5 1
36.0 1
32.5 2
30.5 1 1
18.0 3
American Mathematics Competitions
2005 AMC 12 B Results for Florida
Analysis
Table of Item Difficulty for the 2005
American High School Mathematics Examination
Tabulation of responses for all Participants
Percent of Responses
ITEM A B C D E OMITS ?
____ _____ _____ _____ _____ _____ _____ _____
1 9.19* 0.18 0.19 0.12 0.28 0.04 0.00
2 0.07 0.18 0.15 9.23* 0.15 0.22 0.00
3 0.12 0.01 9.12* 0.21 0.32 0.22 0.00
4 0.10 9.06* 0.27 0.12 0.12 0.34 0.00
5 8.19* 0.07 0.71 0.03 0.04 0.96 0.00
6 3.07* 0.86 0.62 0.43 0.32 4.71 0.00
7 1.09 1.45 0.25 2.74* 0.58 3.89 0.00
8 0.99 1.30 4.68* 0.04 0.86 2.14 0.00
9 0.35 7.80* 0.32 0.41 0.29 0.81 0.00
10 0.10 0.44 0.15 2.23 3.91* 3.17 0.00
11 1.24 0.97 0.58 4.20* 0.75 2.26 0.00
12 0.34 0.60 0.81 1.53* 0.07 6.64 0.00
13 0.35 0.41 0.25 2.40* 0.19 6.39 0.00
14 0.86 1.02 0.68 0.40 1.14* 5.91 0.00
15 0.56 0.43 0.40 5.03* 0.40 3.19 0.00
16 0.31 0.25 0.80 0.65* 0.31 7.68 0.00
17 0.34 1.00* 0.28 0.22 0.60 7.55 0.00
18 1.47 0.53 0.68* 0.27 0.27 6.78 0.00
19 0.27 0.29 0.27 0.34 2.63* 6.21 0.00
20 0.16 0.29 4.63* 0.55 1.68 2.67 0.01
21 0.15 0.38 0.69* 0.43 0.21 8.14 0.00
22 0.40 0.74 0.28 0.34 0.18* 8.07 0.00
23 0.10 0.25* 0.34 0.21 0.00 9.10 0.00
24 0.34* 0.27 0.37 0.15 0.22 8.66 0.00
25 0.21* 0.35 0.09 0.31 0.40 8.64 0.00
(*) Correct Response
(?) Response the computer was unable to read due to incomplete
erasures or two answers marked in the same column
