American Mathematics Competitions
2009 AMC 10 A Results for Nebraska
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 1066
Number of unofficial participants: 0
Average score of participants: 56.7
Average score for female students is: 52.6 ( 468 Students)
Average score for male students is: 61.1 ( 460 Students)
Average score for unspecified gender is 56.3 ( 138 Students)
Average score for grade 10 is: 58.3 ( 511 Students)
Average score for grade 9 is: 54.4 ( 439 Students)
Average score for grade 8 and below is: 65.5 ( 31 Students)
Average score with unknown grade: 55.9 ( 85 Students)
AIME qualifying score = 120.0 or better
Number of AIME qualifers 6
Number of schools returning results 45
Average school winning score 85.47
American Mathematics Competitions
2009 AMC 12 A Results for Nebraska
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 1267
Number of unofficial participants: 0
Average score of participants: 58.1
Average score for female students is: 55.6 ( 544 Students)
Average score for male students is: 60.6 ( 572 Students)
Average score for unspecified gender is 57.6 ( 151 Students)
Average score for grade 12 is: 60.7 ( 477 Students)
Average score for grade 11 is: 56.0 ( 540 Students)
Average score for grade 10 is: 61.1 ( 86 Students)
Average score for grade 9 is: 53.8 ( 62 Students)
Average score for grade 8 and below is: 66.8 ( 2 Students)
Average score with unknown grade: 57.0 ( 100 Students)
AIME qualifying score = 97.5 or better
Number of AIME qualifers 13
Number of schools returning results 49
Average school winning score 82.84
Average school team score 232.93
American Mathematics Competitions
2009 AMC 10 B Results for Nebraska
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 179
Number of unofficial participants: 0
Average score of participants: 67.1
Average score for female students is: 62.6 ( 75 Students)
Average score for male students is: 71.7 ( 73 Students)
Average score for unspecified gender is 67.5 ( 31 Students)
Average score for grade 10 is: 69.3 ( 92 Students)
Average score for grade 9 is: 63.7 ( 60 Students)
Average score for grade 8 and below is: 64.0 ( 6 Students)
Average score with unknown grade: 68.6 ( 21 Students)
AIME qualifying score = 120.0 or better
Number of AIME qualifers 5
Number of schools returning results 9
Average school winning score 105.17
American Mathematics Competitions
2009 AMC 12 B Results for Nebraska
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 254
Number of unofficial participants: 0
Average score of participants: 62.9
Average score for female students is: 59.3 ( 84 Students)
Average score for male students is: 64.7 ( 131 Students)
Average score for unspecified gender is 64.7 ( 39 Students)
Average score for grade 12 is: 65.1 ( 93 Students)
Average score for grade 11 is: 59.2 ( 100 Students)
Average score for grade 10 is: 65.1 ( 35 Students)
Average score for grade 9 is: 60.8 ( 12 Students)
Average score for grade 8 and below is: 84.8 ( 2 Students)
Average score with unknown grade: 69.3 ( 12 Students)
AIME qualifying score = 100.0 or better
Number of AIME qualifers 12
Number of schools returning results 12
Average school winning score 94.88
Average school team score 249.38
2009 State AMC 12 TEAM Score Distribution
-----------------------------------------------
score A B Rank
-----------------------------------------------
331.5 1 1
322.5 1 2
315.0 1 3
309.0 2 4
306.0 1 6
297.0 1 7
285.0 1 1 8
282.0 1 10
276.0 1 11
271.5 1 12
268.5 2 13
264.0 1 15
262.5 1 16
258.0 1 17
253.5 2 18
252.0 2 20
249.0 1 22
246.0 1 1 23
244.5 1 25
243.0 1 26
238.5 1 27
237.0 1 28
232.5 3 29
231.0 1 32
225.0 1 33
223.5 1 34
222.0 2 35
220.5 3 37
219.0 4 40
217.5 2 44
214.5 1 46
213.0 1 47
211.5 1 48
208.5 1 49
205.5 1 50
201.0 1 51
199.5 1 52
193.5 1 53
190.5 1 54
189.0 2 55
183.0 1 57
180.0 1 58
168.0 2 59
72.0 1 61
2009 AMC Contest Score Distributions
-----------------------------------------------
score 12 A 12 B 10 A 10 B
-----------------------------------------------
144.0 1
138.0 1 1
132.0 1 2
126.0 2 1
121.5 1
120.0 1
117.0 1
114.0 1
112.5 1 1 1
111.0 2 1
109.5 1 1 1
108.0 1 3 1
106.5 1 1 1
105.0 2
103.5 1 1
102.0 3 4 1
100.5 4 2 1
99.0 1 5 1 1
97.5 3 3 4 1
96.0 4 1 3 1
94.5 6 3 4 2
93.0 4 4 4 1
91.5 1 3 4
90.0 4 4 11 1
88.5 8 5 8 2
87.0 7 4 11 2
85.5 8 6 9 4
84.0 4 7 10 8
82.5 11 4 11 1
81.0 18 7 13 2
79.5 16 6 6 3
78.0 26 3 13 5
76.5 18 3 5 4
75.0 19 2 8 5
73.5 29 2 18 7
72.0 27 14 21 3
70.5 28 8 25 10
69.0 40 4 17 6
67.5 44 6 24 6
66.0 42 4 32 5
64.5 55 6 21 1
63.0 51 3 35 4
61.5 50 5 31 6
60.0 57 9 36 6
58.5 48 6 39 3
57.0 51 3 25 3
55.5 58 4 34 6
54.0 59 9 65 7
52.5 42 4 44 7
51.0 38 5 50 5
49.5 46 5 42 6
48.0 47 5 50 5
46.5 44 7 30 2
45.0 23 8 28 4
43.5 18 6 42 4
42.0 43 8 41 2
40.5 24 4 33 2
39.0 19 7 28 3
37.5 21 2 27 2
36.0 27 4 23 3
34.5 11 2 15 2
33.0 7 2 12 1
31.5 7 4 9
30.0 13 3 9
28.5 4 2 2
27.0 3 3 4
25.5 5 2
24.0 7 3 3
22.5 3 3 1
21.0 2 1 2
19.5 3 1 1
18.0 2 4 1
13.5 1
12.0 2 1
American Mathematics Competitions
2009 AMC 10 A Results for Nebraska
SCORE DISTRIBUTION
score ----gender----------- -----------grade-----------------
male female ? <=6 7 8 9 10 ?
----------------------------------------------------------------------------------------
144.0 1 1
138.0 1
132.0 1 1
126.0 2 2
121.5 1 1
114.0 1 1
112.5 1 1
109.5 1 1
108.0 1 1
105.0 2 2
103.5 1 1
102.0 2 1 1 2 1
100.5 1 1
99.0 1 1
97.5 2 1 1 2 1
96.0 3 1 2
94.5 2 1 1 2 1
93.0 1 2 1 1 2
91.5 2 1 1 2
90.0 6 2 1 1 6 3
88.5 6 1 1 4 3
87.0 8 3 8 3
85.5 5 2 2 6 1
84.0 6 4 1 3 6
82.5 8 2 4 6 1
81.0 7 3 1 5 6 1
79.5 5 1 2 4
78.0 8 3 1 3 9
76.5 2 3 5
75.0 5 3 3 5
73.5 10 6 1 2 14 1
72.0 16 5 1 6 14
70.5 10 12 11 12 2
69.0 8 6 6 9 2
67.5 10 9 11 12 1
66.0 15 11 12 15 5
64.5 4 14 1 10 9 1
63.0 20 11 1 18 14 2
61.5 17 9 8 20 3
60.0 22 9 13 19 4
58.5 17 17 1 9 25 4
57.0 9 13 7 16 2
55.5 15 14 1 16 15 2
54.0 33 26 3 31 26 5
52.5 22 19 1 23 18 2
51.0 17 23 24 20 6
49.5 16 22 21 18 3
48.0 15 29 2 23 21 4
46.5 11 14 2 12 12 4
45.0 10 16 1 12 13 2
43.5 13 22 1 26 10 5
42.0 14 22 2 23 15 1
40.5 10 20 1 14 15 3
39.0 8 16 2 12 11 3
37.5 7 17 12 14 1
36.0 6 12 9 11 3
34.5 3 11 5 10
33.0 4 5 6 4 2
31.5 1 7 3 5 1
30.0 1 7 5 4
28.5 1 1 2
27.0 2 2 2 2
25.5 1 1 1
24.0 1 2 1 2
22.5 1 1
21.0 2 2
19.5 1 1
18.0 1
13.5 1 1
12.0 1
American Mathematics Competitions
2009 AMC 10 A Results for Nebraska
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 0.28 0.38 0.66 12.01 85.65* 1.03 0.00
2 89.68* 2.06 0.84 1.41 2.25 3.75 0.00
3 2.44 14.82 50.09* 9.47 4.97 18.20 0.00
4 12.95* 9.01 4.88 7.79 15.85 49.53 0.00
5 10.23 5.25 4.22 3.85 37.52* 38.84 0.09
6 41.28* 3.28 9.01 4.32 1.41 40.71 0.00
7 5.16 4.60 15.95* 3.66 38.37 32.18 0.09
8 15.95 65.10* 4.97 1.78 1.50 10.69 0.00
9 6.75 12.95* 8.44 4.88 0.75 66.14 0.09
10 4.41 14.26* 5.82 8.82 3.38 63.13 0.19
11 2.25 3.56 4.69 35.46* 2.44 51.50 0.09
12 2.91 8.16 20.17* 10.98 7.22 50.56 0.00
13 20.17 4.22 2.35 17.64 7.22* 48.31 0.09
14 26.36* 1.22 5.07 4.41 15.29 47.65 0.00
15 2.81 3.56 3.66 7.32 40.99* 41.65 0.00
16 29.36 4.13 3.28 5.44* 5.25 52.53 0.00
17 4.03 6.94 2.81* 1.97 4.69 79.55 0.00
18 23.92 9.76 7.32 9.19* 6.00 43.81 0.00
19 5.25 6.94* 5.63 6.00 2.06 74.11 0.00
20 10.79 11.44 10.60 26.74* 1.50 38.93 0.00
21 1.78 1.13 12.57* 2.63 2.44 79.46 0.00
22 4.78 6.38 30.68 8.16* 3.00 47.00 0.00
23 2.63 2.16 3.75 2.63 9.94* 78.89 0.00
24 7.69 15.01 4.22* 2.25 6.10 64.73 0.00
25 3.66 3.10* 5.91 3.00 3.75 80.49 0.09
(*) 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 Nebraska
SCORE DISTRIBUTION
score ----gender----------- -----------grade-----------------
male female ? <=6 7 8 9 10 11 12 13 ?
----------------------------------------------------------------------------------------
111.0 2 2
108.0 1 1
106.5 1 1
103.5 1
100.5 2 3 1
99.0 1
97.5 1 1 2 1
96.0 3 2 2
94.5 4 2 2 1 3
93.0 3 1 1 2 1
91.5 1 1
90.0 3 1 2 2
88.5 6 2 3 1 1 3
87.0 4 3 2 5
85.5 4 3 1 6 1
84.0 1 3 4
82.5 6 4 2 1 7 1
81.0 12 4 1 10 6 1
79.5 9 5 1 6 9
78.0 14 10 1 3 10 11 1
76.5 9 6 1 3 13 1
75.0 10 6 1 4 12 2
73.5 18 8 3 2 10 12 2
72.0 14 12 1 1 10 14 1
70.5 12 9 2 4 6 11 5
69.0 23 11 3 3 17 14 3
67.5 25 18 1 5 20 17 1
66.0 18 15 1 5 11 20 5
64.5 30 23 1 4 27 21 2
63.0 20 26 3 6 16 22 4
61.5 23 22 2 2 25 17 4
60.0 27 25 1 3 23 28 2
58.5 23 19 3 5 24 14 2
57.0 20 27 1 4 24 19 3
55.5 34 16 3 2 31 17 5
54.0 33 19 2 3 27 22 5
52.5 11 22 4 3 21 7 7
51.0 14 16 3 21 8 6
49.5 19 24 1 2 23 18 2
48.0 12 27 1 1 20 19 6
46.5 13 26 1 1 24 13 5
45.0 5 17 1 2 13 6 1
43.5 3 14 3 10 4 1
42.0 17 22 2 4 16 19 2
40.5 6 16 1 1 12 8 2
39.0 8 7 2 10 3 4
37.5 9 6 1 2 11 3 4
36.0 11 13 5 1 6 14 1
34.5 5 5 1 7 2 1
33.0 2 4 5 2
31.5 4 2 1 1 1 3 1
30.0 3 8 2 6 4 1
28.5 1 3 4
27.0 2 1 1 1 1
25.5 5 1 2 2
24.0 2 4 2 3 2
22.5 1 2 1 2
21.0 1 2
19.5 1 2 1 2
18.0 2 2
12.0 1 1 1
American Mathematics Competitions
2009 AMC 12 A Results for Nebraska
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 81.06* 7.89 1.66 1.58 2.05 5.68 0.08
2 2.29 8.52 72.30* 6.08 3.87 6.71 0.24
3 7.02 66.69* 6.95 7.10 3.31 8.92 0.00
4 92.90* 1.42 1.10 0.63 1.66 2.29 0.00
5 1.66 3.47 3.39 61.96* 1.26 28.18 0.08
6 25.41 4.66 3.24 18.55 17.36* 30.70 0.08
7 2.45 13.42* 7.10 2.92 2.84 71.27 0.00
8 42.46* 0.71 7.10 3.87 13.97 31.73 0.16
9 1.74 4.74 5.60 16.42* 7.02 64.40 0.08
10 2.92 8.29 29.36* 11.44 5.60 42.38 0.00
11 3.24 3.08 4.81 5.76 60.54* 22.49 0.08
12 10.89 19.02* 6.87 7.89 4.81 50.43 0.08
13 9.31 12.79 11.13 8.68* 5.29 52.80 0.00
14 2.29 3.87* 8.84 11.60 6.63 66.69 0.08
15 6.24 5.84 7.18 13.81* 4.66 62.27 0.00
16 11.60 8.21 7.34 5.13* 2.76 64.96 0.00
17 3.47 3.55 4.89* 4.18 7.89 76.01 0.00
18 9.39 5.76* 5.29 3.00 4.10 72.45 0.00
19 6.16 10.26 5.52* 8.92 4.18 64.96 0.00
20 4.58 2.84 6.87 3.95 11.05* 70.72 0.00
21 5.52 4.50 3.47* 2.92 4.66 78.85 0.08
22 2.68 4.34 5.13 4.42 2.05* 81.29 0.08
23 2.13 3.47 3.55 2.60* 2.21 86.03 0.00
24 9.63 4.74 3.39 3.16 1.03* 78.06 0.00
25 3.00* 3.95 5.60 5.76 6.87 74.82 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 Nebraska
SCORE DISTRIBUTION
score ----gender----------- -----------grade-----------------
male female ? <=6 7 8 9 10 ?
----------------------------------------------------------------------------------------
138.0 1 1
132.0 2 1 1
126.0 1 1
120.0 1 1
112.5 1 1
111.0 1 1
109.5 1 1
106.5 1
102.0 1 1
99.0 1
97.5 1
96.0 1 1
94.5 2 1 1
93.0 1 1
91.5 2 2 2
90.0 1
88.5 1 2
87.0 1 1 1 1
85.5 3 1 1 3
84.0 4 3 1 6 1
82.5 1 1
81.0 1 1 2
79.5 1 2 2 1
78.0 2 2 2 3
76.5 2 1 2 2
75.0 1 3 2 1 2
73.5 4 3 1 3 3
72.0 1 2 2 1
70.5 4 5 4 6
69.0 3 1 2 2 2
67.5 3 3 1 1 4
66.0 4 5
64.5 1 1
63.0 2 2 4
61.5 1 4 2 4
60.0 1 3 1 3 2
58.5 2 1 1 1
57.0 1 1 1 2
55.5 1 2 1 2 3
54.0 3 3 1 4 2
52.5 4 3 2 5
51.0 2 2 3 2
49.5 2 3 2 3 1
48.0 2 1 2 1 2
46.5 1 1 2
45.0 3 2 2
43.5 3 2 2
42.0 1 1 1 1
40.5 1 1 2
39.0 2 2 1
37.5 2 2
36.0 1 2 1 1 1
34.5 1 1 1 1
33.0 1 1
19.5 1 1
American Mathematics Competitions
2009 AMC 10 B Results for Nebraska
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 0.56 75.98* 4.47 13.41 3.91 1.68 0.00
2 3.91 1.12 89.39* 0.56 0.56 4.47 0.00
3 1.68 2.79 70.95* 17.32 1.12 6.15 0.00
4 1.68 1.68 65.36* 10.61 3.35 17.32 0.00
5 10.06 3.35 21.79 50.28* 1.68 12.85 0.00
6 1.68 2.79 6.15 76.54* 2.79 10.06 0.00
7 11.17 18.44 48.60* 11.73 5.59 4.47 0.00
8 4.47 31.84* 6.15 40.78 5.59 11.17 0.00
9 27.93* 7.26 5.59 5.03 3.35 50.84 0.00
10 9.50 2.79 3.91 5.59 41.34* 36.87 0.00
11 61.45* 3.91 5.03 8.38 1.68 19.55 0.00
12 21.79* 11.73 13.97 15.64 9.50 26.82 0.56
13 2.79 15.08 42.46* 8.94 11.73 18.99 0.00
14 3.35 29.05 24.02 9.50* 6.15 27.93 0.00
15 9.50 6.70 2.79 6.70 49.16* 25.14 0.00
16 2.23 12.85* 5.59 2.79 6.70 69.83 0.00
17 18.99 18.99 14.53* 1.68 1.12 44.69 0.00
18 5.59 5.59 4.47 12.85* 2.79 68.72 0.00
19 30.17* 16.20 9.50 9.50 5.03 29.61 0.00
20 7.26 15.64* 3.35 2.23 5.59 65.92 0.00
21 6.70 17.32 5.03 11.17* 5.03 54.75 0.00
22 2.23 5.03* 4.47 5.59 3.35 79.33 0.00
23 6.15 8.94 13.97* 8.94 2.79 59.22 0.00
24 14.53* 7.82 3.91 6.15 3.91 63.69 0.00
25 19.55 13.41* 11.17 9.50 6.70 39.66 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 Nebraska
SCORE DISTRIBUTION
score ----gender----------- -----------grade-----------------
male female ? <=6 7 8 9 10 11 12 13 ?
----------------------------------------------------------------------------------------
117.0 1 1
112.5 1 1
109.5 1 1
108.0 3 1 2
106.5 1
102.0 3 1 2
100.5 1 1 1 1
99.0 4 1 2 3
97.5 2 1 2 1
96.0 1
94.5 1 2 1 2
93.0 3 1 1 3
90.0 3 1 2 1
88.5 3 2 1 3 1
87.0 3 1 1 1 1
85.5 4 2 1 4 1
84.0 2 2 4 2 1
82.5 2 1 1 1 2
81.0 2 4 1 4 1 1
79.5 4 1 3 2 1
78.0 3 1 1 1
76.5 1 2 1
75.0 1 1 1
73.5 1 1 1
72.0 9 2 2 5 5 2
70.5 4 3 1 1 4 1 1
69.0 2 2 2 2
67.5 1 3 2 1 2 1
66.0 2 2 1 1 2
64.5 2 3 1 1 4
63.0 1 2 1 2
61.5 3 1 3 1
60.0 5 3 2 4 3
58.5 1 5 1 1 2 2
57.0 1 1 1
55.5 2 2 1 2 1
54.0 5 2 3 2 4
52.5 2 2 2 2
51.0 2 2 1 3 1
49.5 1 4 1 4
48.0 3 2 2 1
46.5 1 5 4 3
45.0 3 4 1 3 2 2
43.5 4 2 4 2
42.0 5 3 1 7
40.5 4 3 1
39.0 3 4 2 4 1
37.5 1 1
36.0 3 1 3
34.5 1 1 1 1
33.0 1 2
31.5 3 1 1 2 1
30.0 2 1 2 1
28.5 1 1 1 1
27.0 3 1 2
24.0 2 1 2 1
22.5 3 3
21.0 1 1
18.0 2 1 3 1
American Mathematics Competitions
2009 AMC 12 B Results for Nebraska
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 0.79 76.77* 7.48 12.99 1.18 0.79 0.00
2 2.36 2.76 76.38* 14.57 1.57 2.36 0.00
3 12.60 2.36 22.44 53.94* 1.57 7.09 0.00
4 3.94 5.91 74.02* 8.27 2.76 5.12 0.00
5 1.97 0.39 4.72 74.41* 4.72 13.78 0.00
6 12.60 16.54 55.51* 7.48 5.12 2.76 0.00
7 2.76 44.49* 7.48 33.07 3.94 8.27 0.00
8 10.63 8.27 2.76 6.69 59.06* 12.60 0.00
9 51.18* 6.30 4.33 5.91 1.97 30.31 0.00
10 36.61* 20.08 11.02 9.06 4.72 18.50 0.00
11 4.72 32.28 21.65 22.44* 5.51 13.39 0.00
12 5.12 3.94 8.27 6.69 28.35* 46.85 0.79
13 6.69 5.12 11.81 20.47* 5.91 50.00 0.00
14 17.72 20.08 27.17* 3.54 1.18 30.31 0.00
15 1.97 44.09* 13.78 8.66 4.33 27.17 0.00
16 6.30 4.72* 6.30 5.12 1.57 75.98 0.00
17 20.87 18.11* 11.02 7.09 13.78 29.13 0.00
18 7.09 9.84 16.14* 12.20 6.69 47.64 0.39
19 2.36 3.54 9.45 2.76 3.54* 78.35 0.00
20 5.12 6.69 6.69* 3.94 6.30 71.26 0.00
21 8.27* 7.87 8.27 14.96 26.77 33.86 0.00
22 3.94 4.72 5.91* 4.72 4.33 76.38 0.00
23 2.36 4.72 7.09 5.91* 3.15 76.77 0.00
24 8.66 7.48* 8.27 3.94 0.79 70.87 0.00
25 11.81 5.91 9.45 5.91 3.94* 62.99 0.00
(*) Correct Response
(?) Response the computer was unable to read due to incomplete
erasures or two answers marked in the same column