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Missing Title
American Mathematics Competitions
2005 AMC 10 A Results for Nevada
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 254
Number of unofficial participants: 14
Average score of participants: 71.3
Average score for female students is: 69.2 ( 126 Students)
Average score for male students is: 74.8 ( 104 Students)
Average score for unspecified gender is 67.1 ( 24 Students)
Average score for grade 10 is: 71.6 ( 131 Students)
Average score for grade 9 is: 72.2 ( 92 Students)
Average score for grade 8 and below is: 65.2 ( 13 Students)
Average score with unknown grade: 69.1 ( 18 Students)
AIME qualifying score = 120.0 or better
Number of AIME qualifers 2
Number of schools returning results 11
Average school winning score 100.05
American Mathematics Competitions
2005 AMC 12 A Results for Nevada
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 357
Number of unofficial participants: 11
Average score of participants: 77.7
Average score for female students is: 75.7 ( 157 Students)
Average score for male students is: 79.9 ( 175 Students)
Average score for unspecified gender is 74.8 ( 25 Students)
Average score for grade 13 is: 83.0 ( 1 Student)
Average score for grade 12 is: 80.7 ( 162 Students)
Average score for grade 11 is: 75.1 ( 159 Students)
Average score for grade 10 is: 79.8 ( 9 Students)
Average score for grade 9 is: 58.0 ( 2 Students)
Average score with unknown grade: 75.0 ( 24 Students)
AIME qualifying score = 100.0 or better
Number of AIME qualifers 25
Number of schools returning results 12
Average school winning score 109.92
Average school team score 303.00
American Mathematics Competitions
2005 AMC 10 B Results for Nevada
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 172
Number of unofficial participants: 0
Average score of participants: 77.8
Average score for female students is: 71.6 ( 65 Students)
Average score for male students is: 82.4 ( 91 Students)
Average score for unspecified gender is 76.7 ( 16 Students)
Average score for grade 10 is: 78.1 ( 104 Students)
Average score for grade 9 is: 78.9 ( 49 Students)
Average score for grade 8 and below is: 73.0 ( 13 Students)
Average score with unknown grade: 74.5 ( 6 Students)
AIME qualifying score = 120.0 or better
Number of AIME qualifers 5
Number of schools returning results 8
Average school winning score 115.69
American Mathematics Competitions
2005 AMC 12 B Results for Nevada
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 274
Number of unofficial participants: 0
Average score of participants: 75.5
Average score for female students is: 74.1 ( 130 Students)
Average score for male students is: 77.5 ( 133 Students)
Average score for unspecified gender is 67.6 ( 11 Students)
Average score for grade 12 is: 74.6 ( 156 Students)
Average score for grade 11 is: 76.1 ( 110 Students)
Average score for grade 10 is: 79.8 ( 2 Students)
Average score for grade 9 is: 112.5 ( 2 Students)
Average score for grade 8 and below is: 80.0 ( 1 Student)
Average score with unknown grade: 69.8 ( 3 Students)
AIME qualifying score = 100.0 or better
Number of AIME qualifers 8
Number of schools returning results 8
Average school winning score 102.50
Average school team score 268.19
2005 State AMC 12 TEAM Score Distribution
-----------------------------------------------
score A B Rank
-----------------------------------------------
339.0 1 1
338.0 1 2
334.5 1 3
333.0 1 4
325.0 1 5
322.5 1 6
314.0 1 7
306.0 1 8
304.0 1 9
301.5 1 10
300.5 1 11
295.5 1 12
295.0 1 13
294.5 1 14
290.5 1 15
287.5 1 16
249.5 1 17
239.0 1 18
229.0 1 19
83.0 1 20
2005 AMC Contest Score Distributions
-----------------------------------------------
score 12 A 12 B 10 A 10 B
-----------------------------------------------
144.0 1
138.0 1
132.5 1
132.0 1
130.0 1
129.0 1
128.5 1
126.5 1
123.0 1
122.5 2
117.0 1
116.5 1
115.0 1
114.5 1
113.5 1
112.5 1 1
111.0 1
110.0 1 3
109.5 1
108.5 1 1
108.0 5
107.5 2
106.5 1 1
106.0 1
105.5 1
104.5 3 1
103.0 1 1 1
102.5 1
102.0 2 2 2 1
101.0 3 2
100.5 2 1
99.5 2 1
99.0 1 1
98.5 3 3
97.5 2 2 2
97.0 5 2 3 1
96.5 1
96.0 2 2 2
95.5 1
95.0 8 8 3 4
94.5 3
94.0 4 2
93.5 4 2 1 1
93.0 1 1
92.5 5 4 5
92.0 1 1
91.5 3 1 2
91.0 2 1 1
90.5 2 1 1 1
90.0 3 1 3
89.5 1
89.0 17 9 3 3
88.5 1 1 2 1
88.0 6 5 2 3
87.5 4 2 1 2
87.0 2 3 3
86.5 6 1 2 1
86.0 1 1
85.5 8 5 2
85.0 1 1 7 1
84.5 6 6 2 1
84.0 6 6 1 5
83.5 3 4 2 1
83.0 11 10 2 6
82.5 3 2 1 1
82.0 4 8 1
81.5 6 2 2 2
81.0 5 8 5
80.5 3 1 7 6
80.0 3 2
79.5 4 7 6 1
79.0 1 2 1
78.5 8 7 5 3
78.0 2 1 1
77.5 4 4 2 2
77.0 9 13 4 5
76.5 3 3 2
76.0 7 6 2 3
75.5 3 4 1 1
75.0 4 4 4 1
74.5 5 7 6 2
74.0 7 2 4 1
73.5 2 4 2 4
73.0 1 1 1 1
72.5 3 2 3 1
72.0 3 3 3 1
71.5 1 2 1 3
71.0 11 3 4 4
70.5 2 3 1 6
70.0 4 7 3 3
69.5 4
69.0 8 1 7 2
68.5 3 3 2
68.0 4 3 2 2
67.5 3 2 6 4
67.0 4 1
66.5 6 3 8 2
66.0 1 4 5
65.5 3 3 2
65.0 3 3 1 3
64.5 2 1 3
64.0 2 2 4 2
63.5 6 2 1 1
63.0 9 1 1 4
62.5 2 2 1
62.0 2 2 1
61.5 6 2 1 1
61.0 1 2 2
60.5 2 3 3
60.0 1 1 5 1
59.5 3 3 1 1
59.0 4 2 3
58.5 2 2
58.0 3 3
57.5 1 2 1 1
57.0 1 2 1 2
56.5 2 1 2
56.0 3 1 5 1
55.5 1 2 1
55.0 3 1 1
54.5 3 5 1
54.0 3 1 2 1
53.5 4 1
53.0 1 1 3 1
52.5 1
52.0 1 4 4
51.5 2 2 2
50.5 2 2
50.0 1 1 1 1
49.5 1 2
49.0 1
48.5 1
48.0 1 2 2
47.5 2 1
47.0 2
45.5 1 1
44.5 1 1 1
44.0 2 1 1 1
43.5 1
43.0 1 2 1
42.5 1
42.0 1 2
41.5 1
41.0 1
40.5 1
40.0 1
39.0 1
37.0 1 1 1
36.5 1 1 1
36.0 1 1 1 1
35.5 1
35.0 1 1
34.5 1
33.0 1
28.0 1
24.0 1
22.0 1
19.5 1
16.0 1
American Mathematics Competitions
2005 AMC 10 A Results for Nevada
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
149.0 124.0 99.0 1
148.5 123.5 98.5
148.0 123.0 98.0
147.5 122.5 97.5 1 1
147.0 122.0 97.0 2 1
146.5 121.5 96.5 1
146.0 121.0 96.0
145.5 120.5 95.5 1
145.0 120.0 95.0 2
144.5 119.5 94.5
144.0 119.0 94.0
143.5 118.5 93.5 1
143.0 118.0 93.0 1
142.5 117.5 92.5
142.0 117.0 1 92.0 1
141.5 116.5 91.5
141.0 116.0 91.0
140.5 115.5 90.5 1
140.0 115.0 90.0 1 1
139.5 114.5 1 89.5 1
139.0 114.0 89.0 2 1
138.5 113.5 88.5 1
138.0 1 113.0 88.0 1 1
137.5 112.5 87.5 1
137.0 112.0 87.0
136.5 111.5 86.5 1 1
136.0 111.0 86.0 1
135.5 110.5 85.5
135.0 110.0 1 85.0 2 4
134.5 109.5 84.5 1 1
134.0 109.0 84.0 1
133.5 108.5 1 83.5 1
133.0 108.0 83.0 1 1
132.5 107.5 1 1 82.5
132.0 1 107.0 82.0
131.5 106.5 1 81.5 2
131.0 106.0 81.0 4 1
130.5 105.5 80.5 3 4
130.0 105.0 80.0 1 1
129.5 104.5 79.5 2 4
129.0 104.0 79.0 2
128.5 103.5 78.5 3
128.0 103.0 1 78.0
127.5 102.5 77.5 1
127.0 102.0 2 77.0 2 2
126.5 101.5 76.5
126.0 101.0 76.0 1 1
125.5 100.5 1 75.5 1
American Mathematics Competitions
2005 AMC 10 A Results for Nevada
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
75.0 4 50.0 1 25.0
74.5 2 4 49.5 1 24.5
74.0 3 49.0 24.0
73.5 2 48.5 23.5
73.0 1 48.0 1 1 23.0
72.5 3 47.5 1 22.5
72.0 1 2 47.0 22.0 1
71.5 1 46.5 21.5
71.0 3 1 46.0 21.0
70.5 1 45.5 20.5
70.0 3 45.0 20.0
69.5 2 1 44.5 19.5 1
69.0 2 5 44.0 1 19.0
68.5 2 1 43.5 1 18.5
68.0 1 1 43.0 1 1 18.0
67.5 1 4 42.5 1 17.5
67.0 3 1 42.0 1 17.0
66.5 2 3 41.5 16.5
66.0 2 2 41.0 1 16.0
65.5 1 2 40.5 1 15.5
65.0 1 40.0 15.0
64.5 1 1 39.5 14.5
64.0 2 2 39.0 14.0
63.5 1 38.5 13.5
63.0 1 38.0 13.0
62.5 1 37.5 12.5
62.0 1 37.0 1 12.0
61.5 1 36.5 11.5
61.0 36.0 1 11.0
60.5 1 2 35.5 10.5
60.0 2 3 35.0 10.0
59.5 1 34.5 9.5
59.0 2 1 34.0 9.0
58.5 1 1 33.5 8.5
58.0 2 33.0 8.0
57.5 1 32.5 7.5
57.0 1 32.0 7.0
56.5 2 31.5 6.5
56.0 2 3 31.0 6.0
55.5 1 1 30.5 5.5
55.0 1 30.0 5.0
54.5 3 2 29.5 4.5
54.0 2 29.0 4.0
53.5 1 28.5 3.5
53.0 1 2 28.0 3.0
52.5 27.5 2.5
52.0 4 27.0 2.0
51.5 1 1 26.5 1.5
51.0 26.0 1.0
50.5 2 25.5 .5
0.0 0 0
American Mathematics Competitions
2005 AMC 10 A Results for Nevada
SCORE DISTRIBUTION
score -----------grade-----------
6 7 8 9 10 unknown
---------------------------
138.0 1
132.0 1
117.0 1
114.5 1
110.0 1
108.5 1
107.5 2
106.5 1
103.0 1
102.0 2
100.5 1
99.0 1
97.5 2
97.0 1 2
96.5 1
95.5 1
95.0 1 1 1
93.5 1
93.0 1
92.0 1
90.5 1
90.0 2 1
89.5 1
89.0 2 1
88.5 1 1
88.0 1 1
87.5 1
86.5 1 1
86.0 1
85.0 3 3 1
84.5 1 1
84.0 1
83.5 1 1
83.0 1 1
82.5 1
81.5 2
81.0 1 1 3
80.5 7
80.0 2
79.5 2 4
79.0 1 1
78.5 1 2 2
77.5 2
77.0 1 3
76.0 2
75.5 1
75.0 2 2
74.5 2 4
74.0 2 1 1
73.5 1 1
73.0 1
72.5 1 2
72.0 3
71.5 1
71.0 4
70.5 1
70.0 1 1 1
69.5 2 2
69.0 5 2
68.5 2 1
68.0 1 1
67.5 1 2 2 1
67.0 2 1 1
66.5 4 3 1
66.0 2 2 1
65.5 1 2
65.0 1
64.5 2 1
64.0 2 2
63.5 1
63.0 1
62.5 1
62.0 1
61.5 1
60.5 2 1
60.0 1 4
59.5 1
59.0 3
58.5 2
58.0 1 1 1
57.5 1
57.0 1
56.5 2
56.0 3 2
55.5 1 1
55.0 1
54.5 3 1 1
54.0 2
53.5 1
53.0 3
52.0 4
51.5 1 1
50.5 1 1
50.0 1
49.5 1 1
48.0 2
47.5 1 1
44.5 1
44.0 1
43.5 1
43.0 2
42.5 1
42.0 1
41.0 1
40.5 1
40.0 1
37.0 1
36.5 1
36.0 1
35.5 1
22.0 1
19.5 1
American Mathematics Competitions
2005 AMC 10 A Results for Nevada
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 0.24 0.20 0.55 8.35* 0.47 0.20 0.00
2 0.16 0.16 4.88* 0.00 1.65 3.15 0.00
3 0.00 8.78* 0.47 0.28 0.12 0.35 0.00
4 0.43 1.30* 1.61 0.79 0.59 5.28 0.00
5 5.59* 0.59 3.50 0.08 0.08 0.16 0.00
6 0.24 4.72* 3.54 0.20 0.08 1.22 0.00
7 1.26 3.46* 0.43 0.59 0.71 3.54 0.00
8 0.94 0.51 3.90* 0.24 0.31 4.09 0.00
9 1.30 4.92* 1.57 0.12 0.12 1.97 0.00
10 1.77* 0.51 0.94 0.63 0.04 6.10 0.00
11 0.71 2.52* 0.28 1.18 0.08 5.24 0.00
12 0.31 1.22* 0.39 0.20 0.94 6.93 0.00
13 1.10 0.51 0.55 0.35 1.02* 6.46 0.00
14 0.71 0.47 0.43 0.31 2.36* 5.71 0.00
15 0.28 0.83 0.67 1.38 0.83* 6.02 0.00
16 0.71 0.39 0.87 2.09* 0.16 5.79 0.00
17 0.24 0.28 0.43 1.93* 0.47 6.65 0.00
18 1.69* 2.28 1.10 3.03 0.28 1.61 0.00
19 0.43 0.94 0.59 3.46* 0.63 3.94 0.00
20 0.31* 0.16 0.71 0.59 0.63 7.60 0.00
21 1.85 0.94* 0.16 0.35 0.47 6.22 0.00
22 0.94 0.35 0.35 2.05* 0.51 5.79 0.00
23 0.24 0.31 1.14* 1.61 0.71 5.98 0.00
24 0.98 0.79* 0.31 0.12 0.08 7.72 0.00
25 0.31 0.75 0.87 0.94* 0.00 7.13 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 Nevada
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 2
149.0 124.0 99.0
148.5 123.5 98.5 1 1
148.0 123.0 1 98.0
147.5 122.5 97.5 1
147.0 122.0 97.0 4 1
146.5 121.5 96.5
146.0 121.0 96.0 2
145.5 120.5 95.5
145.0 120.0 95.0 4 4
144.5 119.5 94.5
144.0 119.0 94.0 2 2
143.5 118.5 93.5 2 2
143.0 118.0 93.0 1
142.5 117.5 92.5 4 1
142.0 117.0 92.0
141.5 116.5 1 91.5 1 2
141.0 116.0 91.0 1
140.5 115.5 90.5 1
140.0 115.0 1 90.0 1 2
139.5 114.5 89.5
139.0 114.0 89.0 6 10
138.5 113.5 1 88.5 1
138.0 113.0 88.0 2 4
137.5 112.5 87.5 2 2
137.0 112.0 87.0 1 1
136.5 111.5 86.5 3 2
136.0 111.0 86.0
135.5 110.5 85.5 7 1
135.0 110.0 85.0 1
134.5 109.5 84.5 3 3
134.0 109.0 84.0 5 1
133.5 108.5 1 83.5 3
133.0 108.0 3 1 83.0 6 5
132.5 107.5 82.5 2 1
132.0 107.0 82.0 4
131.5 106.5 1 81.5 3 3
131.0 106.0 81.0 4 1
130.5 105.5 1 80.5 1 1
130.0 105.0 80.0
129.5 104.5 2 1 79.5 2 2
129.0 1 104.0 79.0 1
128.5 103.5 78.5 4 4
128.0 103.0 1 78.0 1 1
127.5 102.5 77.5 3 1
127.0 102.0 1 77.0 4 5
126.5 1 101.5 76.5 2 1
126.0 101.0 3 76.0 3 3
125.5 100.5 2 75.5 2
American Mathematics Competitions
2005 AMC 12 A Results for Nevada
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
75.0 1 2 50.0 1 25.0
74.5 4 1 49.5 24.5
74.0 1 6 49.0 1 24.0
73.5 2 48.5 23.5
73.0 1 48.0 1 23.0
72.5 1 2 47.5 22.5
72.0 2 1 47.0 22.0
71.5 1 46.5 21.5
71.0 5 5 46.0 21.0
70.5 2 45.5 1 20.5
70.0 4 45.0 20.0
69.5 44.5 19.5
69.0 5 2 44.0 2 19.0
68.5 2 1 43.5 18.5
68.0 1 2 43.0 18.0
67.5 2 1 42.5 17.5
67.0 42.0 17.0
66.5 3 3 41.5 16.5
66.0 1 41.0 16.0
65.5 3 40.5 15.5
65.0 3 40.0 15.0
64.5 1 1 39.5 14.5
64.0 1 1 39.0 14.0
63.5 1 5 38.5 13.5
63.0 3 5 38.0 13.0
62.5 1 37.5 12.5
62.0 1 37.0 1 12.0
61.5 4 2 36.5 1 11.5
61.0 36.0 1 11.0
60.5 1 1 35.5 10.5
60.0 35.0 1 10.0
59.5 1 1 34.5 9.5
59.0 2 1 34.0 9.0
58.5 1 1 33.5 8.5
58.0 3 33.0 1 8.0
57.5 1 32.5 7.5
57.0 32.0 7.0
56.5 1 1 31.5 6.5
56.0 1 1 31.0 6.0
55.5 1 30.5 5.5
55.0 1 2 30.0 5.0
54.5 2 1 29.5 4.5
54.0 2 1 29.0 4.0
53.5 28.5 3.5
53.0 28.0 3.0
52.5 27.5 2.5
52.0 1 27.0 2.0
51.5 1 1 26.5 1.5
51.0 26.0 1.0
50.5 1 1 25.5 .5
0.0 0 0
American Mathematics Competitions
2005 AMC 12 A Results for Nevada
SCORE DISTRIBUTION
score -----------grade-----------
6 7 8 9 10 11 12 13 unknown
---------------------------
129.0 1
126.5 1
123.0 1
116.5 1
115.0 1
113.5 1
108.5 1
108.0 1 3 1
106.5 1
105.5 1
104.5 1 2
103.0 1
102.0 2
101.0 1 2
100.5 2
99.5 1 1
98.5 1 1 1
97.5 1 1
97.0 1 4
96.0 1 1
95.0 2 5 1
94.0 2 2
93.5 2 2
93.0 1
92.5 1 1 3
91.5 1 2
91.0 2
90.5 1 1
90.0 2 1
89.0 1 7 8 1
88.5 1
88.0 3 3
87.5 4
87.0 1 1
86.5 2 3 1
85.5 2 6
85.0 1
84.5 2 4
84.0 2 4
83.5 3
83.0 1 2 7 1
82.5 2 1
82.0 1 3
81.5 3 2 1
81.0 4 1
80.5 2 1
79.5 3 1
79.0 1
78.5 4 4
78.0 2
77.5 4
77.0 8 1
76.5 1 2
76.0 4 2 1
75.5 2 1
75.0 1 2 1
74.5 2 3
74.0 2 5
73.5 2
73.0 1
72.5 2 1
72.0 1 2
71.5 1
71.0 7 4
70.5 2
70.0 4
69.0 5 1 2
68.5 1 2
68.0 2 1 1
67.5 2 1
66.5 3 3
66.0 1
65.5 1 2
65.0 3
64.5 1 1
64.0 1 1
63.5 3 3
63.0 7 1 1
62.5 1 1
62.0 1 1
61.5 3 3
61.0 1
60.5 1 1
60.0 1
59.5 1 1 1
59.0 1 2 1
58.5 2
58.0 2 1
57.5 1
57.0 1
56.5 1 1
56.0 2 1
55.5 1
55.0 2 1
54.5 1 1 1
54.0 1 2
53.0 1
52.0 1
51.5 1 1
50.5 2
50.0 1
49.0 1
48.0 1
45.5 1
44.0 2
37.0 1
36.5 1
36.0 1
35.0 1
33.0 1
American Mathematics Competitions
2005 AMC 12 A Results for Nevada
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 0.06 0.03 0.20 9.38* 0.17 0.17 0.00
2 0.00 9.66* 0.08 0.14 0.06 0.06 0.00
3 0.62 3.78* 0.70 0.42 0.64 3.84 0.00
4 6.36* 0.42 3.00 0.11 0.00 0.11 0.00
5 0.22 6.50* 2.07 0.17 0.08 0.95 0.00
6 0.78 4.62* 0.34 0.36 0.76 3.14 0.00
7 0.53 0.17 7.20* 0.11 0.06 1.93 0.00
8 0.28 0.31 0.22 1.90* 0.25 7.03 0.00
9 3.14* 0.36 0.70 0.31 0.14 5.35 0.00
10 0.25 2.69* 0.17 0.56 0.08 6.25 0.00
11 1.06 0.45 0.20 0.39 3.36* 4.54 0.00
12 1.01 0.22 0.17 3.39* 1.43 3.78 0.00
13 0.06 0.28 0.53 2.80* 0.42 5.91 0.00
14 0.31 0.59 2.63 0.95* 0.39 5.13 0.00
15 0.14 0.17 1.29* 0.84 0.70 6.83 0.03
16 0.28 0.17 0.84 0.53* 0.25 7.93 0.00
17 1.23* 0.98 1.40 0.31 0.31 5.74 0.03
18 0.34* 0.28 0.34 0.22 0.08 8.74 0.00
19 1.06 2.04* 1.01 0.45 0.67 4.76 0.00
20 0.25 0.14 0.06 0.08 0.20* 9.27 0.00
21 0.34 0.53 0.45* 0.17 0.00 8.52 0.00
22 0.28 0.50* 0.17 0.25 0.14 8.66 0.00
23 0.53 0.50* 0.28 0.34 0.31 8.04 0.00
24 0.06 0.14* 0.17 0.14 0.00 9.50 0.00
25 0.22 0.28 0.20* 0.17 0.17 8.96 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 Nevada
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 1
149.0 124.0 99.0 1
148.5 123.5 98.5
148.0 123.0 98.0
147.5 122.5 2 97.5
147.0 122.0 97.0 1
146.5 121.5 96.5
146.0 121.0 96.0 1
145.5 120.5 95.5
145.0 120.0 95.0 3 1
144.5 119.5 94.5 2 1
144.0 1 119.0 94.0
143.5 118.5 93.5 1
143.0 118.0 93.0
142.5 117.5 92.5 4 1
142.0 117.0 92.0 1
141.5 116.5 91.5 2
141.0 116.0 91.0 1
140.5 115.5 90.5 1
140.0 115.0 90.0
139.5 114.5 89.5
139.0 114.0 89.0 2 1
138.5 113.5 88.5 1
138.0 113.0 88.0 2
137.5 112.5 1 87.5 2
137.0 112.0 87.0 1 2
136.5 111.5 86.5 1
136.0 111.0 1 86.0
135.5 110.5 85.5 2
135.0 110.0 3 85.0 1
134.5 109.5 1 84.5 1
134.0 109.0 84.0 4 1
133.5 108.5 83.5 1
133.0 108.0 83.0 3 2
132.5 1 107.5 82.5 1
132.0 107.0 82.0 1
131.5 106.5 81.5 2
131.0 106.0 1 81.0
130.5 105.5 80.5 3 1
130.0 105.0 80.0
129.5 104.5 79.5 1
129.0 104.0 79.0
128.5 1 103.5 78.5 1 2
128.0 103.0 78.0
127.5 102.5 1 77.5 1 1
127.0 102.0 77.0 2 3
126.5 101.5 76.5 1 1
126.0 101.0 76.0 3
125.5 100.5 75.5
American Mathematics Competitions
2005 AMC 10 B Results for Nevada
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
75.0 50.0 1 25.0
74.5 2 49.5 24.5
74.0 1 49.0 24.0
73.5 1 3 48.5 23.5
73.0 1 48.0 23.0
72.5 1 47.5 1 22.5
72.0 1 47.0 22.0
71.5 2 1 46.5 21.5
71.0 3 1 46.0 21.0
70.5 2 4 45.5 20.5
70.0 1 2 45.0 20.0
69.5 44.5 1 19.5
69.0 1 1 44.0 1 19.0
68.5 2 43.5 18.5
68.0 1 1 43.0 1 18.0
67.5 2 2 42.5 17.5
67.0 42.0 1 1 17.0
66.5 41.5 16.5
66.0 41.0 16.0 1
65.5 1 1 40.5 15.5
65.0 3 40.0 15.0
64.5 39.5 14.5
64.0 1 39.0 1 14.0
63.5 38.5 13.5
63.0 2 2 38.0 13.0
62.5 37.5 12.5
62.0 37.0 12.0
61.5 36.5 11.5
61.0 1 1 36.0 1 11.0
60.5 35.5 10.5
60.0 1 35.0 1 10.0
59.5 1 34.5 9.5
59.0 34.0 9.0
58.5 33.5 8.5
58.0 33.0 8.0
57.5 1 32.5 7.5
57.0 2 32.0 7.0
56.5 31.5 6.5
56.0 1 31.0 6.0
55.5 1 30.5 5.5
55.0 30.0 5.0
54.5 1 29.5 4.5
54.0 1 29.0 4.0
53.5 28.5 3.5
53.0 1 28.0 3.0
52.5 1 27.5 2.5
52.0 27.0 2.0
51.5 26.5 1.5
51.0 26.0 1.0
50.5 25.5 .5
0.0 0 0
American Mathematics Competitions
2005 AMC 10 B Results for Nevada
SCORE DISTRIBUTION
score -----------grade-----------
6 7 8 9 10 unknown
---------------------------
144.0 1
132.5 1
128.5 1
122.5 1 1
112.5 1
111.0 1
110.0 3
109.5 1
106.0 1
102.5 1
102.0 1
99.5 1
99.0 1
97.0 1
96.0 1 1
95.0 2 2
94.5 1 2
93.5 1
92.5 1 4
92.0 1
91.5 1 1
91.0 1
90.5 1
89.0 3
88.5 1
88.0 2 1
87.5 1 1
87.0 3
86.5 1
85.5 1 1
85.0 1
84.5 1
84.0 1 1 3
83.5 1
83.0 3 2 1
82.5 1
82.0 1
81.5 2
80.5 2 3 1
79.5 1
79.0 1
78.5 3
78.0 1
77.5 1 1
77.0 2 3
76.5 2
76.0 3
75.5 1
75.0 1
74.5 1 1
74.0 1
73.5 3 1
73.0 1
72.5 1
72.0 1
71.5 1 2
71.0 1 3
70.5 2 4
70.0 1 2
69.0 1 1
68.5 2
68.0 1 1
67.5 1 3
67.0 1
66.5 2
65.5 1 1
65.0 1 2
64.0 1 1
63.5 1
63.0 1 3
61.5 1
61.0 1 1
60.0 1
59.5 1
57.5 1
57.0 2
56.0 1
55.5 1
54.5 1
54.0 1
53.0 1
52.5 1
50.0 1
47.5 1
44.5 1
44.0 1
43.0 1
42.0 1 1
39.0 1
36.0 1
35.0 1
16.0 1
American Mathematics Competitions
2005 AMC 10 B Results for Nevada
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 7.91* 0.12 0.93 0.35 0.47 0.23 0.00
2 0.17 0.35 0.06 8.02* 0.41 0.99 0.00
3 0.06 0.76 2.56 5.41* 0.70 0.52 0.00
4 1.22 0.06 0.76 5.12* 0.47 2.38 0.00
5 0.06 0.00 8.78* 0.29 0.12 0.76 0.00
6 0.23 8.31* 0.17 0.35 0.17 0.76 0.00
7 0.64 1.10* 0.29 1.16 0.29 6.51 0.00
8 5.00* 0.17 0.99 0.06 0.06 3.72 0.00
9 0.64 0.52 1.16 5.52* 0.70 1.45 0.00
10 1.16* 0.87 0.76 0.17 0.35 6.69 0.00
11 0.23 0.70 0.29 1.10 1.40* 6.28 0.00
12 0.58 1.16 0.17 0.17 0.41* 7.50 0.00
13 0.29 0.70 1.57* 1.98 0.47 5.00 0.00
14 0.58 0.17 1.74* 1.98 0.35 5.17 0.00
15 1.10 0.52 0.70 4.24* 0.52 2.91 0.00
16 0.12 0.64 0.52 0.17* 0.17 8.37 0.00
17 0.29 3.37* 0.70 0.23 0.06 5.35 0.00
18 0.41 4.88 0.99 1.51* 0.41 1.80 0.00
19 0.41 5.06* 0.35 0.47 0.64 3.08 0.00
20 0.70 0.23 1.10* 0.29 0.06 7.62 0.00
21 0.29* 0.29 0.12 0.23 0.06 9.01 0.00
22 0.70 0.93 0.52* 0.06 0.17 7.62 0.00
23 2.85 0.35 0.64* 0.17 0.12 5.87 0.00
24 0.47 0.17 0.17 0.23 1.16* 7.73 0.06
25 0.52 0.35 2.91* 0.12 0.12 5.99 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 Nevada
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
149.0 124.0 99.0
148.5 123.5 98.5 2
148.0 123.0 98.0
147.5 122.5 97.5 1 1
147.0 122.0 97.0 1 1
146.5 121.5 96.5
146.0 121.0 96.0 1 1
145.5 120.5 95.5
145.0 120.0 95.0 4 4
144.5 119.5 94.5
144.0 119.0 94.0 2
143.5 118.5 93.5 1
143.0 118.0 93.0
142.5 117.5 92.5 3 1
142.0 117.0 92.0
141.5 116.5 91.5 1
141.0 116.0 91.0 1
140.5 115.5 90.5 1
140.0 115.0 90.0 1
139.5 114.5 89.5
139.0 114.0 89.0 5 4
138.5 113.5 88.5 1
138.0 113.0 88.0 4 1
137.5 112.5 1 87.5 2
137.0 112.0 87.0 1 2
136.5 111.5 86.5 1
136.0 111.0 86.0 1
135.5 110.5 85.5 2 3
135.0 110.0 85.0 1
134.5 109.5 84.5 1 5
134.0 109.0 84.0 3 3
133.5 108.5 83.5 2 2
133.0 108.0 83.0 6 4
132.5 107.5 82.5 1 1
132.0 107.0 82.0 8
131.5 106.5 81.5 2
131.0 106.0 81.0 5 3
130.5 105.5 80.5 1
130.0 1 105.0 80.0 1 2
129.5 104.5 1 79.5 5 2
129.0 104.0 79.0
128.5 103.5 78.5 5 2
128.0 103.0 1 78.0 1
127.5 102.5 77.5 2 2
127.0 102.0 1 77.0 7 5
126.5 101.5 76.5 3
126.0 101.0 2 76.0 1 5
125.5 100.5 75.5 1 3
American Mathematics Competitions
2005 AMC 12 B Results for Nevada
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
75.0 1 3 50.0 1 25.0
74.5 2 5 49.5 1 24.5
74.0 1 1 49.0 24.0 1
73.5 1 3 48.5 1 23.5
73.0 1 48.0 1 1 23.0
72.5 2 47.5 22.5
72.0 1 2 47.0 2 22.0
71.5 1 1 46.5 21.5
71.0 1 2 46.0 21.0
70.5 1 2 45.5 1 20.5
70.0 5 2 45.0 20.0
69.5 44.5 1 19.5
69.0 1 44.0 19.0
68.5 43.5 18.5
68.0 3 43.0 1 18.0
67.5 1 1 42.5 17.5
67.0 42.0 17.0
66.5 2 41.5 16.5
66.0 1 2 41.0 16.0
65.5 40.5 15.5
65.0 3 40.0 15.0
64.5 39.5 14.5
64.0 2 39.0 14.0
63.5 2 38.5 13.5
63.0 1 38.0 13.0
62.5 2 37.5 12.5
62.0 2 37.0 12.0
61.5 1 1 36.5 1 11.5
61.0 2 36.0 1 11.0
60.5 1 2 35.5 10.5
60.0 1 35.0 10.0
59.5 3 34.5 1 9.5
59.0 1 1 34.0 9.0
58.5 33.5 8.5
58.0 33.0 8.0
57.5 2 32.5 7.5
57.0 1 1 32.0 7.0
56.5 1 31.5 6.5
56.0 1 31.0 6.0
55.5 30.5 5.5
55.0 1 30.0 5.0
54.5 29.5 4.5
54.0 1 29.0 4.0
53.5 1 3 28.5 3.5
53.0 28.0 1 3.0
52.5 27.5 2.5
52.0 2 2 27.0 2.0
51.5 1 1 26.5 1.5
51.0 26.0 1.0
50.5 25.5 .5
0.0 0 0
American Mathematics Competitions
2005 AMC 12 B Results for Nevada
SCORE DISTRIBUTION
score -----------grade-----------
6 7 8 9 10 11 12 13 unknown
---------------------------
130.0 1
112.5 1
104.5 1
103.0 1
102.0 1 1
101.0 2
98.5 1 2
97.5 1 1
97.0 1 1
96.0 1 1
95.0 1 2 5
94.0 1 1
93.5 2
92.5 2 2
91.5 1
91.0 1
90.5 1
90.0 1
89.0 3 6
88.5 1
88.0 4 1
87.5 2
87.0 3
86.5 1
86.0 1
85.5 3 2
85.0 1
84.5 2 4
84.0 2 4
83.5 2 2
83.0 5 5
82.5 1 1
82.0 4 4
81.5 2
81.0 2 6
80.5 1
80.0 1 1 1
79.5 3 4
78.5 2 5
78.0 1
77.5 2 2
77.0 1 5 7
76.5 2 1
76.0 3 3
75.5 2 2
75.0 2 2
74.5 6 1
74.0 2
73.5 1 3
73.0 1
72.5 1 1
72.0 1 2
71.5 2
71.0 3
70.5 3
70.0 1 6
69.0 1
68.0 3
67.5 1 1
66.5 3
66.0 2 1 1
65.0 3
64.5 1
64.0 1 1
63.5 2
63.0 1
62.5 2
62.0 1 1
61.5 1 1
61.0 1 1
60.5 2 1
60.0 1
59.5 1 2
59.0 2
57.5 2
57.0 1 1
56.5 1
56.0 1
55.0 1
54.0 1
53.5 1 3
53.0 1
52.0 2 2
51.5 2
50.0 1
49.5 1
48.5 1
48.0 1 1
47.0 2
45.5 1
44.5 1
44.0 1
43.0 1
41.5 1
37.0 1
36.5 1
36.0 1
34.5 1
28.0 1
24.0 1
American Mathematics Competitions
2005 AMC 12 B Results for Nevada
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 8.72* 0.29 0.44 0.11 0.40 0.04 0.00
2 0.11 0.15 0.18 8.36* 0.55 0.66 0.00
3 0.15 0.18 8.47* 0.18 0.55 0.47 0.00
4 0.18 8.32* 0.18 0.33 0.51 0.47 0.00
5 6.13* 0.04 1.35 0.11 0.11 2.26 0.00
6 1.72* 1.06 0.58 0.29 0.26 6.09 0.00
7 1.06 2.01 0.18 0.91* 0.15 5.69 0.00
8 1.28 2.19 3.28* 0.04 0.88 2.34 0.00
9 0.66 6.35* 0.58 0.51 0.44 1.46 0.00
10 0.29 0.73 0.26 1.72 2.01* 5.00 0.00
11 1.20 0.95 0.84 4.12* 0.33 2.55 0.00
12 0.36 0.77 0.47 0.36* 0.29 7.74 0.00
13 0.66 0.44 0.26 0.69* 0.22 7.74 0.00
14 0.51 0.80 0.66 0.51 0.77* 6.75 0.00
15 0.51 0.73 0.40 3.83* 0.33 4.16 0.04
16 0.22 0.11 0.58 0.18* 0.29 8.61 0.00
17 0.18 0.22* 0.33 0.18 0.55 8.50 0.04
18 1.75 0.47 0.47* 0.11 0.15 7.04 0.00
19 0.29 0.26 0.04 0.62 1.31* 7.48 0.00
20 0.22 0.36 3.47* 0.80 2.41 2.74 0.00
21 0.18 0.29 0.62* 0.33 0.29 8.28 0.00
22 0.51 0.69 0.26 0.26 0.04* 8.25 0.00
23 0.22 0.18* 0.15 0.18 0.11 9.16 0.00
24 0.36* 0.26 0.40 0.18 0.15 8.65 0.00
25 0.55* 0.36 0.15 0.26 0.47 8.21 0.00
(*) Correct Response
(?) Response the computer was unable to read due to incomplete
erasures or two answers marked in the same column
