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2004 - AMC 12A Item Difficulty by Grade

2004 Contest Item Difficulty by Grade
for the AMC 12A
AMC 12A Item Difficulty - Grade 13^, 105 Students
ITEM
A
B
C
D
E
OMITS
?
1
0.29
0.00
3.62
0.29
5.81
*
0.00
0
2
0.29
0.29
8.86
*
0.00
0.38
0.19
0
3
0.29
4.48
*
1.43
0.19
0.38
3.24
0
4
0.00
0.00
0.38
0.29
8.10
*
1.24
0
5
0.86
7.14
*
0.00
0.76
0.19
1.05
0
6
5.24
*
0.29
1.62
0.00
0.67
2.19
0
7
1.14
3.62
*
1.24
1.62
0.29
2.10
0
8
0.57
5.05
*
0.19
0.38
0.29
3.52
0
9
0.19
1.14
5.24
*
0.57
0.67
2.19
0
10
0.19
0.38
6.19
*
0.38
0.10
2.76
0
11
2.95
*
0.19
0.19
0.57
0.29
5.81
0
12
0.10
4.19
*
0.57
0.10
0.57
4.48
0
13
0.57
3.62
*
0.38
0.19
1.14
4.10
0
14
1.81
*
0.00
0.76
1.24
0.10
6.10
0
15
0.48
1.05
1.43
*
0.95
0.38
5.71
0
16
1.52
1.33
*
0.10
0.38
0.57
6.10
0
17
0.38
0.38
1.62
2.67
*
0.19
4.76
0
18
0.38
0.19
0.48
1.33
*
0.48
7.14
0
19
0.10
0.57
0.10
0.38
*
0.38
8.48
0
20
0.86
0.48
1.05
0.29
0.76
*
6.57
0
21
0.10
0.10
0.38
1.24
*
0.29
7.90
0
22
0.19
0.48
*
0.10
0.38
0.29
8.57
0
23
0.10
0.10
0.10
0.48
0.95
*
8.29
0
24
0.19
0.10
0.10
*
0.29
0.29
9.05
0
25
0.38
0.10
0.10
0.29
0.19
*
8.95
0
(*) Correct Response
(?) Response the computer was unable to read due to incomplete erasures or two answers marked in the same column
(^) Note: Students who failed to indicate their grade are not included in this analysis.
ITEM
A
B
C
D
E
OMITS
?
1
0.07
0.12
4.01
0.28
5.44
*
0.08
0
2
0.16
0.23
9.03
*
0.09
0.46
0.04
0
3
0.37
3.91
*
2.03
0.47
0.56
2.66
0
4
0.10
0.05
0.39
0.28
8.52
*
0.65
0
5
1.17
6.68
*
0.05
0.72
0.19
1.20
0
6
4.84
*
0.36
2.13
0.12
0.75
1.80
0
7
1.06
3.45
*
1.52
1.58
0.74
1.64
0
8
1.14
4.96
*
0.25
0.39
0.16
3.10
0
9
0.30
1.12
4.56
*
0.44
0.64
2.95
0
10
0.12
0.33
6.61
*
0.51
0.07
2.36
0
11
2.34
*
0.53
0.54
0.45
0.28
5.87
0
12
0.37
3.65
*
0.58
0.17
0.28
4.95
0
13
0.72
3.20
*
0.44
0.33
0.64
4.67
0
14
1.04
*
0.19
0.77
1.21
0.24
6.55
0
15
0.88
1.26
1.65
*
0.65
0.58
4.99
0
16
1.07
0.40
*
0.15
0.13
0.81
7.43
0
17
0.60
0.54
1.95
1.73
*
0.14
5.04
0
18
0.46
0.33
0.62
1.20
*
0.37
7.01
0
19
0.24
0.50
0.27
0.27
*
0.37
8.35
0
20
0.91
0.61
1.04
0.47
0.67
*
6.30
0
21
0.11
0.20
0.22
0.39
*
0.15
8.93
0
22
0.14
0.30
*
0.13
0.14
0.50
8.79
0
23
0.25
0.23
0.21
0.22
0.33
*
8.76
0
24
0.17
0.16
0.15
*
0.13
0.14
9.25
0
25
0.12
0.15
0.22
0.16
0.08
*
9.28
0
(*) Correct Response
(?) Response the computer was unable to read due to incomplete erasures or two answers marked in the same column
(^) Note: Students who failed to indicate their grade are not included in this analysis.
ITEM
A
B
C
D
E
OMITS
?
1
0.07
0.14
4.28
0.35
5.02
*
0.13
0
2
0.16
0.26
8.84
*
0.09
0.59
0.05
0
3
0.42
3.52
*
2.12
0.49
0.58
2.87
0
4
0.11
0.06
0.47
0.30
8.34
*
0.71
0
5
1.20
5.85
*
0.07
1.03
0.26
1.58
0
6
4.04
*
0.41
2.62
0.14
0.75
2.03
0
7
1.19
3.15
*
1.53
1.70
0.79
1.64
0
8
1.24
4.72
*
0.24
0.42
0.18
3.19
0
9
0.32
1.67
3.70
*
0.49
0.55
3.27
0
10
0.15
0.34
6.42
*
0.56
0.07
2.45
0
11
2.01
*
0.65
0.64
0.48
0.30
5.92
0
12
0.36
3.03
*
0.91
0.17
0.30
5.23
0
13
0.88
2.92
*
0.48
0.36
0.65
4.71
0
14
0.83
*
0.20
0.88
1.07
0.26
6.76
0
15
1.02
1.40
1.50
*
0.76
0.73
4.59
0
16
1.18
0.30
*
0.13
0.11
0.60
7.68
0
17
0.60
0.52
2.40
1.19
*
0.13
5.17
0
18
0.54
0.36
0.57
1.07
*
0.38
7.09
0
19
0.31
0.51
0.27
0.27
*
0.43
8.22
0
20
1.01
0.73
1.17
0.54
0.68
*
5.88
0
21
0.10
0.19
0.22
0.23
*
0.14
9.12
0
22
0.15
0.25
*
0.13
0.15
0.49
8.82
0
23
0.27
0.24
0.21
0.21
0.29
*
8.79
0
24
0.21
0.15
0.16
*
0.12
0.16
9.21
0
25
0.14
0.16
0.25
0.17
0.08
*
9.20
0
(*) Correct Response
(?) Response the computer was unable to read due to incomplete erasures or two answers marked in the same column
(^) Note: Students who failed to indicate their grade are not included in this analysis.
ITEM
A
B
C
D
E
OMITS
?
1
0.07
0.11
3.97
0.35
5.37
*
0.13
0
2
0.17
0.22
9.05
*
0.08
0.44
0.04
0
3
0.37
3.87
*
2.07
0.47
0.54
2.69
0
4
0.07
0.05
0.38
0.29
8.59
*
0.62
0.01
5
1.12
5.88
*
0.07
1.08
0.26
1.60
0
6
4.43
*
0.39
2.33
0.12
0.71
2.01
0
7
1.16
3.39
*
1.63
1.65
0.78
1.39
0
8
1.08
4.77
*
0.21
0.48
0.17
3.28
0
9
0.31
1.59
3.94
*
0.41
0.46
3.29
0
10
0.13
0.33
6.59
*
0.54
0.06
2.35
0
11
2.20
*
0.60
0.54
0.42
0.26
5.99
0
12
0.39
3.32
*
0.81
0.15
0.30
5.04
0
13
0.84
3.14
*
0.43
0.31
0.69
4.59
0
14
1.08
*
0.15
0.75
1.03
0.20
6.79
0
15
1.03
1.28
1.64
*
0.73
0.65
4.66
0
16
1.03
0.42
*
0.11
0.08
0.65
7.71
0
17
0.52
0.48
2.44
1.53
*
0.11
4.92
0
18
0.48
0.30
0.44
1.22
*
0.32
7.25
0
19
0.25
0.40
0.20
0.25
*
0.29
8.60
0
20
0.93
0.75
1.17
0.56
0.74
*
5.85
0
21
0.05
0.12
0.16
0.23
*
0.10
9.34
0
22
0.11
0.22
*
0.09
0.11
0.39
9.08
0
23
0.23
0.21
0.15
0.15
0.26
*
9.00
0
24
0.17
0.10
0.14
*
0.09
0.11
9.38
0
25
0.11
0.13
0.19
0.14
0.07
*
9.36
0
(*) Correct Response
(?) Response the computer was unable to read due to incomplete erasures or two answers marked in the same column
(^) Note: Students who failed to indicate their grade are not included in this analysis.
ITEM
A
B
C
D
E
OMITS
?
1
0.05
0.16
4.51
0.44
4.57
*
0.28
0
2
0.18
0.37
8.69
*
0.10
0.54
0.11
0
3
0.37
3.57
*
2.15
0.39
0.47
3.05
0
4
0.12
0.07
0.49
0.33
8.49
*
0.50
0
5
1.09
4.83
*
0.06
1.07
0.41
2.54
0
6
4.31
*
0.33
2.43
0.16
0.54
2.23
0
7
1.18
3.34
*
1.62
1.73
0.74
1.38
0
8
1.13
4.51
*
0.21
0.52
0.23
3.40
0
9
0.33
1.75
3.67
*
0.38
0.32
3.55
0
10
0.17
0.35
6.39
*
0.45
0.06
2.57
0
11
2.11
*
0.61
0.53
0.47
0.28
5.99
0
12
0.29
2.92
*
0.81
0.15
0.27
5.57
0
13
0.78
2.82
*
0.46
0.23
0.67
5.04
0
14
0.67
*
0.17
0.75
1.06
0.18
7.17
0
15
1.11
1.21
1.67
*
0.71
0.70
4.61
0
16
0.67
0.31
*
0.13
0.09
0.56
8.24
0
17
0.41
0.40
2.60
1.29
*
0.09
5.21
0
18
0.43
0.32
0.38
1.01
*
0.24
7.61
0
19
0.31
0.37
0.26
0.27
*
0.35
8.45
0
20
0.79
0.75
1.12
0.63
0.69
*
6.01
0
21
0.08
0.15
0.14
0.21
*
0.10
9.32
0
22
0.11
0.22
*
0.10
0.11
0.37
9.10
0
23
0.22
0.20
0.15
0.17
0.24
*
9.02
0
24
0.16
0.16
0.16
*
0.15
0.15
9.22
0
25
0.11
0.17
0.19
0.11
0.07
*
9.34
0
(*) Correct Response
(?) Response the computer was unable to read due to incomplete erasures or two answers marked in the same column
(^) Note: Students who failed to indicate their grade are not included in this analysis.
ITEM
A
B
C
D
E
OMITS
?
1
0.00
0.15
3.61
0.23
5.94
*
0.08
0
2
0.08
0.08
9.47
*
0.08
0.30
0.00
0
3
0.38
4.89
*
2.48
0.30
0.38
1.58
0
4
0.15
0.00
0.23
0.38
8.80
*
0.45
0
5
1.20
5.34
*
0.15
1.05
0.38
1.88
0
6
6.39
*
0.30
1.50
0.00
0.45
1.35
0
7
0.68
3.76
*
1.28
2.33
0.53
1.43
0
8
0.83
4.74
*
0.15
0.38
0.30
3.61
0
9
0.08
0.98
5.86
*
0.15
0.00
2.93
0
10
0.08
0.15
7.82
*
0.38
0.15
1.43
0
11
3.83
*
0.60
0.60
0.23
0.30
4.44
0
12
0.15
4.36
*
0.38
0.00
0.23
4.89
0
13
0.23
5.19
*
0.15
0.08
0.53
3.83
0
14
1.95
*
0.15
0.45
1.65
0.23
5.56
0
15
0.45
0.90
2.78
*
0.23
0.53
5.11
0
16
0.68
0.68
*
0.00
0.15
0.83
7.67
0
17
0.30
0.53
2.56
2.71
*
0.08
3.83
0
18
0.45
0.23
0.23
1.58
*
0.15
7.37
0
19
0.08
0.30
0.15
0.45
*
0.15
8.87
0
20
1.05
0.30
1.50
0.38
0.75
*
6.02
0
21
0.08
0.00
0.30
0.68
*
0.23
8.72
0
22
0.00
0.45
*
0.08
0.00
0.45
9.02
0
23
0.15
0.38
0.00
0.00
0.83
*
8.65
0
24
0.08
0.08
0.15
*
0.00
0.23
9.47
0
25
0.08
0.00
0.00
0.15
0.08
*
9.70
0
(*) Correct Response
(?) Response the computer was unable to read due to incomplete erasures or two answers marked in the same column
(^) Note: Students who failed to indicate their grade are not included in this analysis.
2004 Directory for High School
Answers
AMC 10A
posted on 2/16/04
AMC 10B
posted on 1/1/04
AMC 12A
posted on 2/16/04
AMC 12B
posted on 1/1/04
Statistics
12A & 12B
Item Difficulty
in General
by Gender
by Grade
Score Distribution
in General
by Gender
by Grade
Perfect Scores
Team Scores

The AMC Web Site was last updated on 3/18/2004