American Mathematics Competitions
2009 AMC 10 A Results for Nevada
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 212
Number of unofficial participants: 0
Average score of participants: 67.5
Average score for female students is: 61.7 ( 73 Students)
Average score for male students is: 71.9 ( 99 Students)
Average score for unspecified gender is 67.1 ( 40 Students)
Average score for grade 10 is: 64.0 ( 113 Students)
Average score for grade 9 is: 71.1 ( 41 Students)
Average score for grade 8 and below is: 74.2 ( 40 Students)
Average score with unknown grade: 66.2 ( 18 Students)
AIME qualifying score = 120.0 or better
Number of AIME qualifers 5
Number of schools returning results 11
Average school winning score 106.64
American Mathematics Competitions
2009 AMC 12 A Results for Nevada
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 410
Number of unofficial participants: 0
Average score of participants: 63.4
Average score for female students is: 60.5 ( 149 Students)
Average score for male students is: 65.7 ( 209 Students)
Average score for unspecified gender is 63.0 ( 52 Students)
Average score for grade 13 is: 69.0 ( 1 Student)
Average score for grade 12 is: 64.4 ( 160 Students)
Average score for grade 11 is: 62.6 ( 204 Students)
Average score for grade 10 is: 67.9 ( 28 Students)
Average score for grade 9 is: 62.0 ( 6 Students)
Average score with unknown grade: 54.7 ( 11 Students)
AIME qualifying score = 97.5 or better
Number of AIME qualifers 1
Number of schools returning results 9
Average school winning score 88.83
Average school team score 252.67
American Mathematics Competitions
2009 AMC 10 B Results for Nevada
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 221
Number of unofficial participants: 0
Average score of participants: 62.8
Average score for female students is: 57.2 ( 74 Students)
Average score for male students is: 67.1 ( 124 Students)
Average score for unspecified gender is 56.8 ( 23 Students)
Average score for grade 10 is: 63.7 ( 118 Students)
Average score for grade 9 is: 59.8 ( 79 Students)
Average score for grade 8 and below is: 80.6 ( 10 Students)
Average score with unknown grade: 59.0 ( 14 Students)
AIME qualifying score = 120.0 or better
Number of AIME qualifers 1
Number of schools returning results 7
Average school winning score 99.43
American Mathematics Competitions
2009 AMC 12 B Results for Nevada
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 364
Number of unofficial participants: 0
Average score of participants: 55.7
Average score for female students is: 50.5 ( 166 Students)
Average score for male students is: 61.5 ( 168 Students)
Average score for unspecified gender is 51.7 ( 30 Students)
Average score for grade 12 is: 56.1 ( 172 Students)
Average score for grade 11 is: 52.8 ( 165 Students)
Average score for grade 10 is: 64.5 ( 2 Students)
Average score for grade 9 is: 89.5 ( 3 Students)
Average score for grade 8 and below is: 89.4 ( 10 Students)
Average score with unknown grade: 50.9 ( 12 Students)
AIME qualifying score = 100.0 or better
Number of AIME qualifers 7
Number of schools returning results 9
Average school winning score 96.50
Average school team score 272.67
2009 State AMC 12 TEAM Score Distribution
-----------------------------------------------
score A B Rank
-----------------------------------------------
298.5 1 1
297.0 2 2
294.0 1 4
288.0 1 5
285.0 1 6
270.0 1 2 7
259.5 1 10
258.0 1 11
250.5 1 12
247.5 1 13
243.0 1 14
238.5 1 15
235.5 1 16
231.0 1 17
195.0 1 18
2009 AMC Contest Score Distributions
-----------------------------------------------
score 12 A 12 B 10 A 10 B
-----------------------------------------------
141.0 1
126.0 1
123.0 1 1
121.5 1
120.0 1
115.5 1
112.5 2
111.0 1
108.0 1 1 1
106.5 2 1
105.0 1
103.5 1 1
102.0 1 3 1
100.5 2 1
99.0 2 3
97.5 2 1 2
96.0 2 1 4 1
94.5 2 2 6
93.0 1 1 2
91.5 3 4 4
90.0 1 2 1 3
88.5 3 5 3 2
87.0 4 2 1
85.5 4 4 4 1
84.0 2 2 4 5
82.5 11 3 4 1
81.0 7 5 4 3
79.5 10 3 3 4
78.0 13 9 11
76.5 15 7 3 7
75.0 11 4 6 7
73.5 14 6 3 2
72.0 27 3 3 6
70.5 13 9 6 8
69.0 17 9 7 8
67.5 19 11 6 6
66.0 19 8 9 8
64.5 19 8 4 10
63.0 21 10 8 2
61.5 10 7 6 7
60.0 20 12 9 5
58.5 16 10 7 9
57.0 9 12 2 5
55.5 14 7 4 11
54.0 14 11 7 4
52.5 7 22 10 7
51.0 14 12 3 8
49.5 9 14 4 4
48.0 10 12 9 9
46.5 7 17 5 6
45.0 7 10 2 6
43.5 7 9 4 3
42.0 7 12 2 3
40.5 4 16 5 4
39.0 2 9 3 6
37.5 3 10 4
36.0 8 1 4
34.5 4 6 1
33.0 2 1 3
31.5 3 1
30.0 3 6 5
28.5 2 4
27.0 1 3 1
25.5 2
24.0 3 1 1
22.5 2 1
21.0 1
19.5 2
18.0 1 3
16.5 1 1
1
American Mathematics Competitions
2009 AMC 10 A Results for Nevada
SCORE DISTRIBUTION
score ----gender----------- -----------grade-----------------
male female ? <=6 7 8 9 10 ?
----------------------------------------------------------------------------------------
141.0 1 1
126.0 1 1
123.0 1 1
121.5 1
120.0 1 1
115.5 1 1
112.5 1 1 1
111.0 1 1
108.0 1 1
106.5 1 1
103.5 1 1
102.0 3 1 2
100.5 1 1
97.5 1 1
96.0 1 2 1 1
94.5 6 1 1 4
93.0 1 1
91.5 2 2 1 3
90.0 1 1
88.5 1 2 1
85.5 2 2 1 1 2
84.0 2 2 1 1 2
82.5 2 2 1 1 2
81.0 2 2 4
79.5 2 1 1 2
78.0 4 3 1 1 6 1
76.5 3 2 1
75.0 4 2 1 2 3
73.5 2 1 1 1
72.0 1 1 1 2
70.5 3 2 2 3 1
69.0 3 3 2 5
67.5 2 1 2 2 1 1
66.0 7 1 6 2
64.5 4 4
63.0 1 5 1 5 2
61.5 3 1 2 1 1 1 1
60.0 4 1 1 1 5 2
58.5 3 1 1 1 2 1 1
57.0 1 2
55.5 2 2 1 2 1
54.0 1 4 1 2 2 2
52.5 3 6 1 9
51.0 2 3
49.5 3 1 1 3
48.0 5 2 1 2 4 2
46.5 4 1 4
45.0 1 1 2
43.5 1 3 1 2 1
42.0 1 1 1 1
40.5 1 4 1 4
39.0 2 1 2
37.5 1 2 1 3
36.0 1 1
33.0 2 1 1 2
27.0 1 1
24.0 1 1
1 1
American Mathematics Competitions
2009 AMC 10 A Results for Nevada
Analysis
Table of Item Difficulty for the 2009
American Mathematics Competitions 10/12
Tabulation of responses for all Participants
Percent of Responses
ITEM A B C D E OMITS ?
____ _____ _____ _____ _____ _____ _____ _____
1 0.00 0.00 0.00 8.96 90.57* 0.00 0.47
2 94.81* 2.36 0.47 0.47 0.94 0.47 0.47
3 0.47 15.57 70.75* 6.60 1.42 4.72 0.47
4 30.66* 8.49 5.19 6.13 17.92 31.13 0.47
5 13.68 5.66 6.60 2.36 48.58* 22.17 0.94
6 64.62* 3.30 8.96 4.25 0.94 17.45 0.47
7 8.49 7.08 27.83* 2.36 31.60 22.17 0.47
8 8.96 78.30* 4.72 1.42 0.94 5.19 0.47
9 11.79 24.53* 10.38 4.72 0.94 47.17 0.47
10 4.25 20.28* 8.02 10.38 2.36 54.25 0.47
11 2.36 4.72 1.89 61.79* 1.89 26.89 0.47
12 1.89 6.13 27.83* 8.49 8.02 47.17 0.47
13 23.11 8.49 1.42 17.45 16.98* 32.08 0.47
14 46.70* 0.94 2.83 6.13 14.15 28.77 0.47
15 2.36 3.77 7.55 7.08 52.83* 25.94 0.47
16 26.89 6.60 4.72 10.38* 6.13 44.81 0.47
17 7.55 12.26 8.49* 1.42 5.19 64.62 0.47
18 20.28 9.91 5.66 17.45* 10.38 35.85 0.47
19 6.60 12.26* 8.49 8.49 2.36 61.32 0.47
20 8.96 5.66 7.55 39.62* 4.72 33.02 0.47
21 1.42 1.89 13.68* 3.30 1.42 77.83 0.47
22 7.08 5.66 31.60 6.13* 1.42 47.64 0.47
23 3.30 0.94 5.66 2.83 11.79* 75.00 0.47
24 7.55 15.57 9.91* 3.77 3.77 58.96 0.47
25 5.66 3.30* 9.91 3.77 4.25 72.64 0.47
(*) Correct Response
(?) Response the computer was unable to read due to incomplete
erasures or two answers marked in the same column
American Mathematics Competitions
2009 AMC 12 A Results for Nevada
SCORE DISTRIBUTION
score ----gender----------- -----------grade-----------------
male female ? <=6 7 8 9 10 11 12 13 ?
----------------------------------------------------------------------------------------
108.0 1 1
96.0 1 1 2
94.5 1 1 1
93.0 1 1
90.0 1 1
88.5 1 2 1 1 1
87.0 2 1 2 2
85.5 4 1 1 2
84.0 1 1 2
82.5 6 3 4 3 1
81.0 5 2 1 4 2
79.5 7 1 4 6
78.0 8 4 2 6 5
76.5 8 6 8 7
75.0 8 2 1 6 4
73.5 9 3 3 5 6
72.0 12 9 1 13 12 1
70.5 6 6 8 5
69.0 10 3 11 4 1 1
67.5 10 7 1 11 6 1
66.0 10 9 1 1 9 8
64.5 8 9 3 8 8
63.0 11 7 3 8 10
61.5 7 2 5 5
60.0 10 9 1 7 12
58.5 9 4 7 8 1
57.0 2 6 1 5 3
55.5 8 6 2 9 3
54.0 7 6 2 9 3
52.5 4 3 2 5
51.0 6 6 1 8 5
49.5 2 6 1 6 2
48.0 4 5 1 1 4 4
46.5 3 4 5 2
45.0 3 4 4 3
43.5 3 4 1 3 3
42.0 2 3 5 2
40.5 2 2 3 1
39.0 2 2
37.5 2 1 2
34.5 2 1 1 2
33.0 2 2
30.0 1 1 2
28.5 1 1 1
27.0 1
21.0 1 1
18.0 1 1
American Mathematics Competitions
2009 AMC 12 A Results for Nevada
Analysis
Table of Item Difficulty for the 2009
American Mathematics Competitions 10/12
Tabulation of responses for all Participants
Percent of Responses
ITEM A B C D E OMITS ?
____ _____ _____ _____ _____ _____ _____ _____
1 87.56* 6.34 0.49 0.98 1.71 2.93 0.00
2 0.98 3.90 90.00* 1.46 1.46 2.20 0.00
3 7.56 75.61* 3.17 5.37 3.17 5.12 0.00
4 94.88* 0.73 0.00 0.49 2.68 1.22 0.00
5 0.73 1.95 2.68 80.73* 1.46 12.44 0.00
6 20.98 3.41 3.90 19.27 27.07* 25.37 0.00
7 3.17 17.80* 8.54 2.44 1.71 66.34 0.00
8 55.12* 1.22 7.32 3.41 10.00 22.93 0.00
9 4.15 5.61 4.15 29.27* 5.37 51.46 0.00
10 4.15 5.37 35.37* 10.98 5.37 38.78 0.00
11 1.71 2.20 3.66 6.10 71.71* 13.90 0.73
12 14.63 17.07* 7.80 10.24 3.90 46.34 0.00
13 9.27 12.44 13.17 12.20* 6.83 46.10 0.00
14 3.90 3.17* 9.02 17.56 6.59 59.76 0.00
15 9.27 6.10 12.44 21.71* 7.07 43.41 0.00
16 13.41 11.71 5.61 4.63* 3.66 60.98 0.00
17 4.15 5.61 5.85* 3.90 10.73 69.76 0.00
18 10.73 5.61* 4.15 3.41 5.12 70.98 0.00
19 8.54 10.49 6.34* 9.02 4.15 61.46 0.00
20 2.68 2.44 5.85 6.10 7.80* 75.12 0.00
21 4.63 3.41 4.63* 2.44 5.85 79.02 0.00
22 3.66 3.90 2.93 3.90 2.93* 82.68 0.00
23 1.95 1.46 3.41 3.17* 1.71 88.29 0.00
24 11.46 3.66 2.68 2.68 0.49* 79.02 0.00
25 2.20* 5.37 3.90 6.83 9.51 72.20 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
2009 AMC 10 B Results for Nevada
SCORE DISTRIBUTION
score ----gender----------- -----------grade-----------------
male female ? <=6 7 8 9 10 ?
----------------------------------------------------------------------------------------
123.0 1 1
105.0 1 1
102.0 1 1
99.0 3 1 2
97.5 2 1 1
96.0 1 1
93.0 2 2
91.5 3 1 2 2
90.0 3 1 2
88.5 2 2
87.0 1 1
85.5 1 1
84.0 4 1 2 1 2
82.5 1 1
81.0 2 1 1 2
79.5 3 1 3 1
78.0 6 4 2 2 7
76.5 3 3 1 5 1
75.0 4 2 1 5 1
73.5 2 1 1
72.0 5 1 3 2
70.5 5 3 3 5
69.0 5 2 1 2 5
67.5 3 3 3 3
66.0 5 1 4 3
64.5 8 2 5 5
63.0 1 1 2
61.5 4 2 3 3 1
60.0 1 4 1 4
58.5 4 5 1 3 5
57.0 2 1 1 3 1
55.5 4 6 3 7 1
54.0 1 2 3 1
52.5 3 3 3 3 1
51.0 3 3 5 2 1
49.5 3 2 1 1
48.0 4 2 2 5 2
46.5 5 1 6
45.0 2 3 2 4
43.5 1 2 3
42.0 1 2 2 1
40.5 2 2 1 3
39.0 2 4 4 2
36.0 2 2 2 2
34.5 1 1
31.5 1 1
30.0 3 3 2
24.0 1 1
22.5 1 1
16.5 1 1
American Mathematics Competitions
2009 AMC 10 B Results for Nevada
Analysis
Table of Item Difficulty for the 2009
American Mathematics Competitions 10/12
Tabulation of responses for all Participants
Percent of Responses
ITEM A B C D E OMITS ?
____ _____ _____ _____ _____ _____ _____ _____
1 0.45 67.87* 7.24 18.55 3.62 2.26 0.00
2 4.52 0.45 88.24* 2.26 0.00 4.52 0.00
3 0.90 4.07 70.14* 14.48 1.81 8.60 0.00
4 0.45 1.36 70.14* 11.31 4.07 12.67 0.00
5 6.33 4.98 23.98 46.15* 2.71 15.84 0.00
6 2.26 1.36 4.07 71.04* 1.81 19.46 0.00
7 20.36 18.10 42.53* 10.41 5.43 3.17 0.00
8 2.26 24.89* 9.95 44.80 2.26 15.84 0.00
9 34.84* 3.62 2.71 7.24 5.88 45.70 0.00
10 9.50 1.81 5.88 4.98 37.56* 40.27 0.00
11 56.56* 9.50 5.43 3.17 2.26 23.08 0.00
12 19.91* 18.55 12.22 15.38 7.69 26.24 0.00
13 3.17 16.74 34.84* 6.33 10.41 28.05 0.45
14 4.52 29.41 20.36 13.12* 6.79 25.79 0.00
15 9.50 8.60 2.26 6.79 39.37* 33.48 0.00
16 2.71 10.86* 7.24 2.71 7.24 69.23 0.00
17 21.27 14.48 13.12* 3.62 0.45 47.06 0.00
18 4.98 3.17 9.95 4.98* 5.43 71.49 0.00
19 16.29* 19.91 7.24 9.50 6.33 40.72 0.00
20 8.14 10.41* 8.14 1.81 2.26 69.23 0.00
21 7.24 11.76 3.17 5.88* 3.62 68.33 0.00
22 2.26 2.26* 6.33 3.62 0.90 84.62 0.00
23 6.79 8.14 7.69* 6.79 0.90 69.68 0.00
24 5.88* 3.17 3.17 4.98 5.88 76.92 0.00
25 12.67 11.76* 11.31 2.26 5.88 56.11 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
2009 AMC 12 B Results for Nevada
SCORE DISTRIBUTION
score ----gender----------- -----------grade-----------------
male female ? <=6 7 8 9 10 11 12 13 ?
----------------------------------------------------------------------------------------
108.0 1 1
106.5 2 2
103.5 1 1
102.0 1 1
100.5 2 1 1
99.0 2 2
97.5 2 2
96.0 1 1
94.5 2 2
91.5 3 3
90.0 1 1 2
88.5 5 1 2 2
87.0 2 1 1
85.5 4 1 1 1 1
84.0 1 1 2
82.5 2 1 2
81.0 2 3 3 2
79.5 2 3
76.5 4 1 4 2
75.0 2 2 2 2
73.5 4 2 1 4 1
72.0 3 1 2
70.5 7 1 2 7
69.0 3 6 1 5 3
67.5 6 3 6 5
66.0 3 5 2 6
64.5 6 1 4 4
63.0 5 5 1 5 4
61.5 4 2 3 4
60.0 6 6 3 9
58.5 5 3 6 3 1
57.0 9 3 8 3 1
55.5 3 3 3 4
54.0 4 7 8 3
52.5 9 12 12 8 2
51.0 6 6 5 7
49.5 6 7 5 8 1
48.0 3 8 6 6
46.5 7 9 9 6 2
45.0 5 3 6 4
43.5 1 7 1 3 5
42.0 5 6 3 9
40.5 5 10 11 5
39.0 5 4 4 5
37.5 4 4 4 5 1
36.0 8 4 4
34.5 5 3 2 1
33.0 1 1
31.5 1 2 3
30.0 5 4 2
28.5 3 2 2
27.0 2 1 2
25.5 2 1 1
24.0 1 1 2 1
22.5 1 1 1
19.5 1 1 1 1
18.0 3 3
16.5 1 1
American Mathematics Competitions
2009 AMC 12 B Results for Nevada
Analysis
Table of Item Difficulty for the 2009
American Mathematics Competitions 10/12
Tabulation of responses for all Participants
Percent of Responses
ITEM A B C D E OMITS ?
____ _____ _____ _____ _____ _____ _____ _____
1 1.37 72.80* 7.42 13.46 4.12 0.82 0.00
2 1.37 7.42 68.13* 11.54 1.65 9.89 0.00
3 12.91 4.67 21.15 46.15* 3.85 11.26 0.00
4 2.20 1.92 68.41* 13.19 3.30 10.99 0.00
5 0.55 3.02 5.49 69.78* 4.12 17.03 0.00
6 13.46 16.21 49.45* 13.46 4.40 3.02 0.00
7 3.85 29.12* 7.14 44.51 3.02 12.09 0.27
8 14.56 7.69 5.77 5.22 46.43* 20.33 0.00
9 34.07* 3.85 3.85 8.79 3.02 46.43 0.00
10 21.15* 18.41 12.09 11.26 5.77 31.32 0.00
11 6.87 26.37 24.45 12.09* 7.97 22.25 0.00
12 4.95 4.12 8.52 5.49 18.41* 58.52 0.00
13 5.77 5.77 5.49 12.09* 6.87 64.01 0.00
14 22.80 14.84 17.58* 1.92 1.10 41.76 0.00
15 1.65 32.97* 22.53 6.87 4.95 31.04 0.00
16 5.22 5.49* 2.75 3.85 1.37 81.32 0.00
17 17.31 12.36* 9.34 5.22 9.07 46.70 0.00
18 5.22 10.16 11.54* 7.97 6.32 58.79 0.00
19 1.37 4.95 4.40 2.75 1.92* 84.62 0.00
20 3.30 4.12 4.12* 3.57 3.30 81.59 0.00
21 4.12* 9.07 6.59 15.66 18.68 45.88 0.00
22 1.65 3.57 4.95* 4.12 1.65 83.79 0.27
23 2.75 6.04 5.22 2.47* 2.47 81.04 0.00
24 8.79 6.32* 3.85 6.59 1.10 73.35 0.00
25 6.04 6.32 4.95 3.30 2.20* 77.20 0.00
(*) Correct Response
(?) Response the computer was unable to read due to incomplete
erasures or two answers marked in the same column