American Mathematics Competitions
2005 AMC 10 A Results for Nebraska
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 1059
Number of unofficial participants: 0
Average score of participants: 66.6
Average score for female students is: 64.5 ( 515 Students)
Average score for male students is: 69.1 ( 505 Students)
Average score for unspecified gender is 63.8 ( 39 Students)
Average score for grade 10 is: 68.2 ( 570 Students)
Average score for grade 9 is: 63.7 ( 439 Students)
Average score for grade 8 and below is: 78.2 ( 37 Students)
Average score with unknown grade: 64.4 ( 13 Students)
AIME qualifying score = 120.0 or better
Number of AIME qualifers 3
Number of schools returning results 39
Average school winning score 93.73
American Mathematics Competitions
2005 AMC 12 A Results for Nebraska
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 1425
Number of unofficial participants: 0
Average score of participants: 70.5
Average score for female students is: 68.4 ( 663 Students)
Average score for male students is: 72.3 ( 722 Students)
Average score for unspecified gender is 73.2 ( 40 Students)
Average score for grade 13 is: 59.3 ( 2 Students)
Average score for grade 12 is: 72.3 ( 660 Students)
Average score for grade 11 is: 69.4 ( 634 Students)
Average score for grade 10 is: 67.3 ( 81 Students)
Average score for grade 9 is: 63.1 ( 30 Students)
Average score with unknown grade: 73.7 ( 18 Students)
AIME qualifying score = 100.0 or better
Number of AIME qualifers 45
Number of schools returning results 44
Average school winning score 97.03
Average school team score 273.56
American Mathematics Competitions
2005 AMC 10 B Results for Nebraska
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 499
Number of unofficial participants: 26
Average score of participants: 72.5
Average score for female students is: 71.6 ( 257 Students)
Average score for male students is: 73.9 ( 223 Students)
Average score for unspecified gender is 69.8 ( 19 Students)
Average score for grade 10 is: 73.4 ( 288 Students)
Average score for grade 9 is: 72.0 ( 188 Students)
Average score for grade 8 and below is: 65.9 ( 17 Students)
Average score with unknown grade: 68.5 ( 6 Students)
AIME qualifying score = 120.0 or better
Number of AIME qualifers 3
Number of schools returning results 23
Average school winning score 101.35
American Mathematics Competitions
2005 AMC 12 B Results for Nebraska
GRAND STATISTICS
TOTAL NUMBER of official students taking exam: 640
Number of unofficial participants: 35
Average score of participants: 76.9
Average score for female students is: 72.2 ( 297 Students)
Average score for male students is: 81.3 ( 319 Students)
Average score for unspecified gender is 76.9 ( 24 Students)
Average score for grade 12 is: 81.8 ( 214 Students)
Average score for grade 11 is: 75.8 ( 335 Students)
Average score for grade 10 is: 68.5 ( 42 Students)
Average score for grade 9 is: 65.7 ( 31 Students)
Average score for grade 8 and below is: 82.8 ( 2 Students)
Average score with unknown grade: 78.3 ( 16 Students)
AIME qualifying score = 100.0 or better
Number of AIME qualifers 36
Number of schools returning results 27
Average school winning score 102.00
Average school team score 287.46
2005 State AMC 12 TEAM Score Distribution
-----------------------------------------------
score A B Rank
-----------------------------------------------
373.0 1 1
370.5 1 2
348.0 1 3
345.0 1 4
330.5 1 5
328.0 1 6
326.5 1 7
322.0 1 1 8
319.0 2 10
317.0 1 12
314.0 1 13
311.0 2 14
310.0 1 16
305.0 1 17
302.5 1 18
301.5 1 19
300.5 1 20
298.5 1 21
297.0 1 22
292.5 1 23
292.0 1 24
291.0 1 25
288.5 1 26
288.0 1 27
287.5 1 28
286.0 1 29
284.0 2 30
282.5 1 32
281.5 1 33
281.0 1 34
279.5 1 35
278.0 1 36
277.5 1 37
276.5 1 38
276.0 1 39
274.5 1 40
274.0 1 41
273.5 1 42
272.5 1 43
270.5 1 44
270.0 1 45
269.5 1 46
269.0 1 47
262.5 2 48
261.5 1 50
261.0 1 51
260.5 1 52
259.0 1 53
257.0 1 54
254.5 1 55
253.5 1 56
251.0 1 57
250.0 1 58
249.5 1 59
246.5 1 60
246.0 1 61
243.5 1 62
242.5 1 63
241.5 1 64
239.5 1 65
239.0 1 66
233.0 1 67
225.0 1 68
215.5 1 69
151.5 1 70
121.0 1 71
2005 AMC Contest Score Distributions
-----------------------------------------------
score 12 A 12 B 10 A 10 B
-----------------------------------------------
139.5 1
137.0 1
136.0 1
134.5 1
133.5 1
129.0 1
125.5 1
125.0 1
121.5 1
120.5 1 1
119.5 1
119.0 1
118.5 3 1
118.0 2
117.0 1 1
116.0 1 2 1 3
115.5 1
115.0 1 2 1
113.5 2
112.5 1 1 2
112.0 1
111.5 1
111.0 1
110.0 1 2
109.0 5 1 1
108.5 1
108.0 4 1
107.5 1 3
107.0 1
106.5 2 2 1
106.0 1
105.5 6 1 3
105.0 2 1
104.5 5 3 1 2
104.0 2 3
103.5 1
103.0 7 1 2
102.5 1 1
102.0 4 1 2
101.5 1 1 2 3
101.0 5 4
100.5 3 3 4
100.0 1
99.5 3 4 1 2
99.0 1 2 1
98.5 7 10 3 2
98.0 5 2
97.5 3 5 2
97.0 3 1 3 1
96.5 1 1
96.0 6 8 2 2
95.5 1 2 4 1
95.0 11 22 2
94.5 2 3 2 1
94.0 4 8 1
93.5 6 5 8 2
93.0 2 1
92.5 11 8 8 3
92.0 1 3 5
91.5 10 12 3 3
91.0 6 4 4 2
90.5 6 3 6
90.0 7 12 4 4
89.5 3 1
89.0 18 17 6 8
88.5 4 3
88.0 10 12 4 5
87.5 4 3 8 9
87.0 8 13 3 1
86.5 11 4 5 2
86.0 1 3 7 3
85.5 14 13 2 1
85.0 1 4 4 4
84.5 27 10 4 2
84.0 6 6 11 5
83.5 14 3 4 3
83.0 21 13 8 3
82.5 1 2 1 2
82.0 26 8 10 4
81.5 3 7 7 4
81.0 30 12 4 6
80.5 11 10 5 10
80.0 12 6 6 7
79.5 19 13 11 8
79.0 3 4 6 4
78.5 28 12 11 7
78.0 10 8 11 7
77.5 27 10 11 11
77.0 19 11 9 9
76.5 11 4 6 1
76.0 31 9 16 8
75.5 12 6 8 3
75.0 18 8 18 11
74.5 15 6 9 10
74.0 21 8 13 3
73.5 23 11 11 5
73.0 10 4 8 2
72.5 31 8 14 8
72.0 12 6 10 6
71.5 39 6 17 7
71.0 15 9 11 11
70.5 23 6 12 3
70.0 25 7 12 6
69.5 5 5 8 7
69.0 31 7 18 6
68.5 14 3 10 5
68.0 25 8 19 7
67.5 18 7 16 9
67.0 16 3 17 3
66.5 22 8 17 7
66.0 15 8 12 3
65.5 27 6 13 9
65.0 16 6 23 5
64.5 24 4 5 2
64.0 15 5 14 10
63.5 13 8 16 5
63.0 31 2 18 5
62.5 13 2 13 3
62.0 19 6 10 9
61.5 15 3 18 8
61.0 14 3 13 9
60.5 18 2 21 6
60.0 13 5 13 6
59.5 18 8 11 7
59.0 17 3 19 3
58.5 8 3 12 3
58.0 17 3 14 5
57.5 16 1 6 3
57.0 21 4 22 4
56.5 9 2 11 3
56.0 15 1 6 4
55.5 10 15 1
55.0 4 7 3
54.5 8 9 3
54.0 11 3 10 4
53.5 6 3 9 4
53.0 6 5 11 2
52.5 6 7 2
52.0 5 4 11 2
51.5 7 2 7 1
51.0 13 2 5 1
50.5 7 4 7
50.0 9 2 3 6
49.5 4 2 4 1
49.0 2 1 3
48.5 1 5 2
48.0 10 3 11 4
47.5 7 2 7 1
47.0 6 2 7
46.5 2 1 5
46.0 6 1 2
45.5 3 2 4 2
45.0 3 2 2
44.5 3 1 7 1
44.0 1 1 4
43.5 2 2 6 2
43.0 3 1 5
42.5 2 1 1 2
42.0 8 3 6 1
41.5 2 1
41.0 1 2 1
40.5 2 2
40.0 1 1 1 1
39.5 3 3 1
39.0 3
38.5 1 1 1
38.0 2
37.0 3 3
36.5 1 1
36.0 4 1 5 4
35.5 2 1 1
35.0 1 2
34.5 1 2 2
34.0 1 2
33.5 1
33.0 1 3 1
32.5 1 1 1
32.0 1 1
31.5 2 1 2
31.0 1 1
30.5 1 1
30.0 6 2 9 1
29.5 2
28.5 1
28.0 1
27.0 1 1
26.5 2
25.5 1
24.5 1
24.0 1 3
23.0 2
22.0 1 1 1
20.5 1
20.0 1
19.5 1
18.5 1
18.0 1 3
17.0 1
14.5 1 1
12.0 1 1
American Mathematics Competitions
2005 AMC 10 A Results for Nebraska
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 1
149.0 124.0 99.0 1
148.5 123.5 98.5 3
148.0 123.0 98.0 3 2
147.5 122.5 97.5
147.0 122.0 97.0 2 1
146.5 121.5 96.5 1
146.0 121.0 96.0 1 1
145.5 120.5 1 95.5 2 1
145.0 120.0 95.0
144.5 119.5 94.5 1 1
144.0 119.0 1 94.0
143.5 118.5 1 93.5 5 3
143.0 118.0 93.0 2
142.5 117.5 92.5 6 2
142.0 117.0 1 92.0 3
141.5 116.5 91.5 2 1
141.0 116.0 1 91.0 1 3
140.5 115.5 90.5 5 1
140.0 115.0 90.0 2 2
139.5 114.5 89.5 1
139.0 114.0 89.0 3 3
138.5 113.5 88.5 3
138.0 113.0 88.0 2 2
137.5 112.5 1 87.5 3 5
137.0 1 112.0 1 87.0 1 2
136.5 111.5 86.5 4 1
136.0 111.0 86.0 6
135.5 110.5 85.5 1 1
135.0 110.0 1 85.0 3 1
134.5 1 109.5 84.5 2 2
134.0 109.0 1 84.0 7 4
133.5 108.5 83.5 2 2
133.0 108.0 83.0 5 2
132.5 107.5 2 1 82.5 1
132.0 107.0 1 82.0 4 6
131.5 106.5 81.5 4 2
131.0 106.0 1 81.0 1 3
130.5 105.5 1 80.5 3 2
130.0 105.0 1 80.0 2 4
129.5 104.5 1 79.5 2 9
129.0 104.0 3 79.0 4 2
128.5 103.5 78.5 6 3
128.0 103.0 2 78.0 5 5
127.5 102.5 77.5 1 9
127.0 102.0 1 77.0 4 5
126.5 101.5 2 76.5 1 5
126.0 101.0 76.0 8 8
125.5 100.5 4 75.5 5 2
American Mathematics Competitions
2005 AMC 10 A Results for Nebraska
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
75.0 10 8 50.0 2 1 25.0
74.5 4 5 49.5 2 2 24.5
74.0 5 8 49.0 2 1 24.0 1 2
73.5 3 7 48.5 2 3 23.5
73.0 5 3 48.0 4 7 23.0 1 1
72.5 11 3 47.5 3 4 22.5
72.0 3 6 47.0 4 3 22.0 1
71.5 10 7 46.5 3 1 21.5
71.0 7 4 46.0 1 1 21.0
70.5 5 7 45.5 1 3 20.5 1
70.0 5 6 45.0 1 1 20.0
69.5 4 3 44.5 3 4 19.5
69.0 5 13 44.0 2 2 19.0
68.5 5 5 43.5 2 3 18.5
68.0 9 10 43.0 5 18.0 3
67.5 9 6 42.5 1 17.5
67.0 5 10 42.0 3 3 17.0
66.5 6 11 41.5 1 16.5
66.0 5 6 41.0 2 16.0
65.5 6 7 40.5 2 15.5
65.0 10 12 40.0 1 15.0
64.5 3 2 39.5 2 1 14.5 1
64.0 7 7 39.0 2 1 14.0
63.5 12 4 38.5 1 13.5
63.0 8 9 38.0 13.0
62.5 5 7 37.5 12.5
62.0 4 5 37.0 1 2 12.0
61.5 9 9 36.5 1 11.5
61.0 6 7 36.0 1 4 11.0
60.5 10 11 35.5 1 10.5
60.0 9 3 35.0 1 1 10.0
59.5 8 3 34.5 2 9.5
59.0 5 14 34.0 2 9.0
58.5 7 5 33.5 8.5
58.0 4 9 33.0 2 1 8.0
57.5 5 32.5 7.5
57.0 8 13 32.0 7.0
56.5 4 7 31.5 1 6.5
56.0 3 3 31.0 1 6.0
55.5 11 3 30.5 1 5.5
55.0 3 4 30.0 2 5 5.0
54.5 4 5 29.5 4.5
54.0 1 8 29.0 4.0
53.5 4 5 28.5 1 3.5
53.0 3 7 28.0 1 3.0
52.5 4 3 27.5 2.5
52.0 4 6 27.0 2.0
51.5 3 4 26.5 1 1 1.5
51.0 3 2 26.0 1.0
50.5 4 2 25.5 1 .5
0.0 0 0
American Mathematics Competitions
2005 AMC 10 A Results for Nebraska
SCORE DISTRIBUTION
score -----------grade-----------
6 7 8 9 10 unknown
---------------------------
137.0 1
134.5 1
120.5 1
119.0 1
118.5 1
117.0 1
116.0 1
112.5 1
112.0 1
110.0 1
109.0 1
107.5 3
107.0 1
106.0 1
105.5 1
105.0 1 1
104.5 1
104.0 1 2
103.0 1 1
102.0 1
101.5 1 1
100.5 3 1
100.0 1
99.5 1
99.0 2
98.5 3
98.0 2 2 1
97.0 1 2
96.5 1
96.0 2
95.5 1 2 1
94.5 2
93.5 7 1
93.0 1 1
92.5 1 1 6
92.0 2 1
91.5 3
91.0 2 2
90.5 1 2 3
90.0 3 1
89.5 1
89.0 6
88.5 1 2
88.0 2 2
87.5 3 5
87.0 1 2
86.5 1 4
86.0 1 3 3
85.5 1 1
85.0 1 3
84.5 2 2
84.0 2 2 7
83.5 2 2
83.0 2 6
82.5 1
82.0 2 8
81.5 3 4
81.0 1 3
80.5 1 4
80.0 1 5
79.5 1 5 5
79.0 2 4
78.5 1 4 6
78.0 1 2 2 6
77.5 5 5 1
77.0 5 4
76.5 3 3
76.0 1 6 8 1
75.5 1 1 6
75.0 1 9 8
74.5 3 6
74.0 2 11
73.5 6 5
73.0 5 3
72.5 5 9
72.0 1 2 7
71.5 1 6 10
71.0 4 7
70.5 4 7 1
70.0 5 7
69.5 5 3
69.0 6 12
68.5 5 4 1
68.0 11 8
67.5 3 13
67.0 8 8 1
66.5 1 4 12
66.0 7 5
65.5 6 7
65.0 9 14
64.5 4 1
64.0 4 10
63.5 1 4 10 1
63.0 1 9 8
62.5 9 4
62.0 4 5 1
61.5 7 11
61.0 7 6
60.5 1 8 12
60.0 6 7
59.5 5 6
59.0 10 9
58.5 4 8
58.0 5 8 1
57.5 3 3
57.0 7 15
56.5 5 6
56.0 6
55.5 1 7 6 1
55.0 6 1
54.5 8 1
54.0 3 7
53.5 6 3
53.0 4 7
52.5 3 4
52.0 3 7 1
51.5 2 5
51.0 4 1
50.5 5 2
50.0 2 1
49.5 4
49.0 2 1
48.5 3 2
48.0 1 8 2
47.5 6 1
47.0 5 1 1
46.5 4 1
46.0 2
45.5 3 1
45.0 2
44.5 2 5
44.0 2 2
43.5 1 5
43.0 4 1
42.5 1
42.0 2 1 3
41.5 1
41.0 2
40.5 2
40.0 1
39.5 1 2
39.0 3
38.5 1
37.0 1 2
36.5 1
36.0 3 2
35.5 1
35.0 1 1
34.5 2
34.0 1 1
33.0 3
32.5 1
32.0 1
31.5 2
31.0 1
30.5 1
30.0 5 4
28.5 1
28.0 1
26.5 2
25.5 1
24.0 1 1 1
23.0 2
22.0 1
20.5 1
18.0 3
14.5 1
American Mathematics Competitions
2005 AMC 10 A Results for Nebraska
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 0.36 0.25 0.34 7.87* 0.67 0.51 0.00
2 0.20 0.14 3.68* 0.11 1.91 3.96 0.00
3 0.11 8.28* 0.59 0.40 0.13 0.48 0.00
4 0.40 0.78* 2.33 0.72 0.50 5.27 0.00
5 4.81* 0.46 4.34 0.11 0.06 0.22 0.00
6 0.26 3.41* 4.20 0.13 0.10 1.89 0.00
7 0.93 2.66* 0.43 0.53 0.87 4.58 0.00
8 1.27 0.34 2.41* 0.21 0.15 5.63 0.00
9 1.28 5.38* 1.04 0.26 0.24 1.78 0.02
10 1.00* 0.47 1.05 0.36 0.13 6.99 0.00
11 0.52 1.77* 0.21 0.87 0.20 6.44 0.00
12 0.28 0.59* 0.34 0.29 0.47 8.02 0.00
13 1.40 0.61 0.49 0.41 0.63* 6.46 0.00
14 0.81 0.53 0.44 0.49 1.87* 5.85 0.00
15 0.59 0.68 0.80 0.74 0.65* 6.53 0.00
16 0.74 0.49 0.69 1.66* 0.04 6.38 0.00
17 0.43 0.37 0.52 1.60* 0.52 6.56 0.00
18 1.63* 1.64 1.44 2.96 0.36 1.97 0.00
19 0.54 0.71 0.77 2.36* 0.81 4.81 0.00
20 0.42* 0.39 0.67 0.45 0.21 7.87 0.00
21 1.83 0.59* 0.25 0.33 0.66 6.35 0.00
22 0.64 0.49 0.37 1.94* 0.55 6.02 0.00
23 0.20 0.53 1.18* 0.98 0.72 6.38 0.01
24 1.08 0.76* 0.33 0.26 0.11 7.45 0.00
25 0.34 0.64 1.00 0.93* 0.24 6.85 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 Nebraska
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 1
149.0 124.0 99.0 1
148.5 123.5 98.5 6 1
148.0 123.0 98.0
147.5 122.5 97.5 2
147.0 122.0 97.0 3
146.5 121.5 96.5
146.0 121.0 96.0 5
145.5 120.5 1 95.5 1
145.0 120.0 95.0 8 3
144.5 119.5 1 94.5 2
144.0 119.0 94.0 3
143.5 118.5 2 1 93.5 5 1
143.0 118.0 93.0
142.5 117.5 92.5 5 6
142.0 117.0 92.0 1
141.5 116.5 91.5 7 3
141.0 116.0 1 91.0 5 1
140.5 115.5 90.5 3 3
140.0 115.0 1 90.0 6
139.5 114.5 89.5
139.0 114.0 89.0 9 7
138.5 113.5 88.5 2 2
138.0 113.0 88.0 5 5
137.5 112.5 87.5 2 1
137.0 112.0 87.0 4 4
136.5 111.5 1 86.5 6 5
136.0 1 111.0 1 86.0 1
135.5 110.5 85.5 8 6
135.0 110.0 85.0 1
134.5 109.5 84.5 18 9
134.0 109.0 84.0 3 3
133.5 1 108.5 83.5 6 8
133.0 108.0 3 1 83.0 15 6
132.5 107.5 82.5 1
132.0 107.0 82.0 17 8
131.5 106.5 2 81.5 1 2
131.0 106.0 81.0 17 12
130.5 105.5 5 1 80.5 6 5
130.0 105.0 80.0 4 7
129.5 104.5 4 1 79.5 8 10
129.0 104.0 79.0 3
128.5 103.5 78.5 16 11
128.0 103.0 6 78.0 9 1
127.5 102.5 1 77.5 12 15
127.0 102.0 77.0 4 15
126.5 101.5 1 76.5 3 8
126.0 101.0 5 76.0 16 14
125.5 100.5 3 75.5 6 4
American Mathematics Competitions
2005 AMC 12 A Results for Nebraska
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
75.0 11 7 50.0 3 6 25.0
74.5 9 5 49.5 3 1 24.5
74.0 11 9 49.0 2 24.0 1
73.5 12 11 48.5 1 23.5
73.0 4 6 48.0 5 5 23.0
72.5 13 16 47.5 2 5 22.5
72.0 8 4 47.0 4 2 22.0
71.5 16 22 46.5 2 21.5
71.0 8 7 46.0 4 2 21.0
70.5 4 19 45.5 2 1 20.5
70.0 10 13 45.0 2 1 20.0
69.5 2 3 44.5 2 1 19.5
69.0 16 14 44.0 1 19.0
68.5 10 3 43.5 2 18.5 1
68.0 14 10 43.0 3 18.0 1
67.5 8 10 42.5 2 17.5
67.0 3 12 42.0 1 7 17.0
66.5 10 12 41.5 16.5
66.0 7 8 41.0 16.0
65.5 12 12 40.5 2 15.5
65.0 5 11 40.0 1 15.0
64.5 11 12 39.5 1 2 14.5
64.0 6 8 39.0 14.0
63.5 6 7 38.5 13.5
63.0 18 13 38.0 1 1 13.0
62.5 6 7 37.5 12.5
62.0 7 12 37.0 2 1 12.0 1
61.5 7 8 36.5 11.5
61.0 3 11 36.0 4 11.0
60.5 8 10 35.5 1 1 10.5
60.0 9 3 35.0 1 10.0
59.5 6 10 34.5 1 9.5
59.0 9 7 34.0 1 9.0
58.5 5 3 33.5 1 8.5
58.0 7 10 33.0 8.0
57.5 7 9 32.5 1 7.5
57.0 7 14 32.0 7.0
56.5 3 6 31.5 1 1 6.5
56.0 5 10 31.0 1 6.0
55.5 4 5 30.5 5.5
55.0 1 3 30.0 3 3 5.0
54.5 3 4 29.5 1 1 4.5
54.0 7 4 29.0 4.0
53.5 2 4 28.5 3.5
53.0 1 5 28.0 3.0
52.5 5 1 27.5 2.5
52.0 3 1 27.0 1 2.0
51.5 3 4 26.5 1.5
51.0 5 7 26.0 1.0
50.5 6 1 25.5 .5
0.0 0 0
American Mathematics Competitions
2005 AMC 12 A Results for Nebraska
SCORE DISTRIBUTION
score -----------grade-----------
6 7 8 9 10 11 12 13 unknown
---------------------------
136.0 1
133.5 1
120.5 1
119.5 1
118.5 1 2
116.0 1
115.0 1
111.5 1
111.0 1
108.0 2 2
106.5 2
105.5 1 5
104.5 1 4
103.0 1 5 1
102.5 1
101.5 1
101.0 1 3 1
100.5 1 1 1
99.5 1 2
99.0 1
98.5 1 4 2
97.5 1 2
97.0 3
96.0 1 2 2 1
95.5 1
95.0 5 6
94.5 2
94.0 3 1
93.5 3 3
92.5 5 6
92.0 1
91.5 1 3 6
91.0 4 2
90.5 1 1 4
90.0 1 1 1 4
89.0 1 8 8 1
88.5 3 1
88.0 7 3
87.5 1 3
87.0 1 2 5
86.5 4 7
86.0 1
85.5 2 6 6
85.0 1
84.5 1 11 15
84.0 2 4
83.5 1 3 10
83.0 11 10
82.5 1
82.0 1 11 13 1
81.5 1 2
81.0 2 5 23
80.5 6 5
80.0 4 8
79.5 1 9 9
79.0 3
78.5 1 10 17
78.0 5 5
77.5 1 15 11
77.0 1 9 9
76.5 1 4 6
76.0 1 1 14 14 1
75.5 1 5 5 1
75.0 1 9 8
74.5 2 8 5
74.0 1 7 13
73.5 1 13 8 1
73.0 2 4 4
72.5 1 2 13 13 2
72.0 2 7 3
71.5 1 2 15 21
71.0 2 3 10
70.5 10 13
70.0 1 10 13 1
69.5 3 2
69.0 2 13 15 1
68.5 1 1 6 6
68.0 2 17 6
67.5 2 9 7
67.0 1 1 7 6 1
66.5 8 14
66.0 1 9 5
65.5 2 2 11 12
65.0 9 7
64.5 18 5 1
64.0 1 3 5 5 1
63.5 8 5
63.0 3 2 19 7
62.5 1 6 6
62.0 8 11
61.5 1 5 9
61.0 1 9 3 1
60.5 2 8 8
60.0 8 4 1
59.5 1 9 8
59.0 1 2 8 6
58.5 1 5 2
58.0 2 1 5 9
57.5 1 7 8
57.0 1 1 9 10
56.5 1 3 5
56.0 6 9
55.5 3 6 1
55.0 1 3
54.5 1 1 3 3
54.0 1 3 6 1
53.5 5 1
53.0 1 5
52.5 2 4
52.0 2 3
51.5 1 5 1
51.0 1 3 9
50.5 2 2 3
50.0 1 6 2
49.5 3 1
49.0 1 1
48.5 1
48.0 6 4
47.5 2 3 2
47.0 1 2 3
46.5 1 1
46.0 1 3 1 1
45.5 1 2
45.0 1 1 1
44.5 2 1
44.0 1
43.5 1 1
43.0 1 2
42.5 1 1
42.0 1 3 4
40.5 1 1
40.0 1
39.5 2 1
38.0 1 1
37.0 1 2
36.0 1 2 1
35.5 1 1
35.0 1
34.5 1
34.0 1
33.5 1
32.5 1
31.5 1 1
31.0 1
30.0 2 2 1 1
29.5 1 1
27.0 1
24.0 1
18.5 1
18.0 1
12.0 1
American Mathematics Competitions
2005 AMC 12 A Results for Nebraska
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 0.08 0.08 0.18 8.91* 0.18 0.58 0.00
2 0.04 9.12* 0.29 0.30 0.04 0.21 0.00
3 0.41 1.98* 1.40 0.65 0.46 5.11 0.00
4 5.75* 0.37 3.52 0.08 0.08 0.19 0.00
5 0.28 4.74* 3.03 0.12 0.10 1.73 0.00
6 0.65 3.49* 0.28 0.40 0.87 4.30 0.01
7 0.83 0.22 4.85* 0.11 0.06 3.93 0.00
8 0.27 0.46 0.32 1.19* 0.27 7.49 0.00
9 1.54* 0.34 0.66 0.29 0.13 7.04 0.00
10 0.33 1.70* 0.18 0.62 0.10 7.08 0.00
11 0.74 0.43 0.29 0.43 2.38* 5.73 0.00
12 0.91 0.31 0.32 1.74* 1.21 5.52 0.00
13 0.18 0.22 0.41 2.24* 0.39 6.55 0.01
14 0.44 0.50 3.09 0.69* 0.53 4.74 0.00
15 0.15 0.32 0.93* 0.72 0.72 7.16 0.00
16 0.18 0.34 0.70 0.43* 0.22 8.12 0.00
17 1.11* 1.32 1.04 0.35 0.43 5.75 0.00
18 0.31* 0.41 0.29 0.26 0.27 8.46 0.00
19 0.94 1.74* 0.97 0.55 1.01 4.79 0.00
20 0.32 0.13 0.11 0.16 0.13* 9.15 0.00
21 0.36 0.34 0.22* 0.27 0.06 8.74 0.00
22 0.44 0.31* 0.32 0.30 0.25 8.39 0.00
23 0.69 0.28* 0.22 0.15 0.32 8.34 0.00
24 0.11 0.11* 0.15 0.17 0.11 9.36 0.00
25 0.29 0.27 0.26* 0.18 0.14 8.86 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 Nebraska
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
150.0 125.0 1 100.0
149.5 124.5 99.5 2
149.0 124.0 99.0 1
148.5 123.5 98.5 1 1
148.0 123.0 98.0 1
147.5 122.5 97.5 2
147.0 122.0 97.0 1
146.5 121.5 96.5 1
146.0 121.0 96.0 1 1
145.5 120.5 95.5 1
145.0 120.0 95.0 2
144.5 119.5 94.5 1
144.0 119.0 94.0 1
143.5 118.5 93.5 2
143.0 118.0 93.0 1
142.5 117.5 92.5 3
142.0 117.0 1 92.0 3 2
141.5 116.5 91.5 3
141.0 116.0 2 1 91.0 2
140.5 115.5 1 90.5
140.0 115.0 1 90.0 1 3
139.5 114.5 89.5
139.0 114.0 89.0 2 6
138.5 113.5 1 1 88.5
138.0 113.0 88.0 3 2
137.5 112.5 2 87.5 3 6
137.0 112.0 87.0 1
136.5 111.5 86.5 1 1
136.0 111.0 86.0 1 2
135.5 110.5 85.5 1
135.0 110.0 2 85.0 2 2
134.5 109.5 84.5 1 1
134.0 109.0 1 84.0 3 2
133.5 108.5 83.5 2 1
133.0 108.0 1 83.0 1 2
132.5 107.5 82.5 1 1
132.0 107.0 82.0 2 2
131.5 106.5 1 81.5 3 1
131.0 106.0 81.0 1 4
130.5 105.5 2 1 80.5 2 8
130.0 105.0 1 80.0 4 3
129.5 104.5 2 79.5 1 7
129.0 1 104.0 79.0 1 3
128.5 103.5 1 78.5 4 3
128.0 103.0 78.0 4 2
127.5 102.5 1 77.5 4 5
127.0 102.0 2 77.0 5 3
126.5 101.5 1 2 76.5 1
126.0 101.0 76.0 6 2
125.5 1 100.5 75.5 2 1
American Mathematics Competitions
2005 AMC 10 B Results for Nebraska
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
75.0 3 7 50.0 4 2 25.0
74.5 6 3 49.5 1 24.5 1
74.0 2 1 49.0 24.0
73.5 5 48.5 2 23.5
73.0 1 1 48.0 4 23.0
72.5 3 5 47.5 1 22.5
72.0 2 4 47.0 22.0 1
71.5 3 4 46.5 21.5
71.0 6 5 46.0 21.0
70.5 1 2 45.5 2 20.5
70.0 1 4 45.0 1 1 20.0 1
69.5 5 2 44.5 1 19.5
69.0 2 3 44.0 19.0
68.5 3 2 43.5 1 1 18.5
68.0 4 3 43.0 18.0
67.5 4 4 42.5 2 17.5
67.0 2 42.0 1 17.0
66.5 3 4 41.5 16.5
66.0 3 41.0 1 16.0
65.5 3 6 40.5 15.5
65.0 1 3 40.0 1 15.0
64.5 2 39.5 1 14.5
64.0 2 8 39.0 14.0
63.5 3 2 38.5 1 13.5
63.0 2 3 38.0 13.0
62.5 3 37.5 12.5
62.0 2 7 37.0 12.0
61.5 5 2 36.5 1 11.5
61.0 1 6 36.0 3 1 11.0
60.5 5 1 35.5 1 10.5
60.0 5 1 35.0 10.0
59.5 3 3 34.5 9.5
59.0 3 34.0 9.0
58.5 3 33.5 8.5
58.0 4 1 33.0 1 8.0
57.5 3 32.5 1 7.5
57.0 2 2 32.0 1 7.0
56.5 1 2 31.5 6.5
56.0 1 3 31.0 6.0
55.5 1 30.5 1 5.5
55.0 1 2 30.0 1 5.0
54.5 1 1 29.5 4.5
54.0 2 2 29.0 4.0
53.5 1 3 28.5 3.5
53.0 1 1 28.0 3.0
52.5 1 27.5 2.5
52.0 1 1 27.0 2.0
51.5 1 26.5 1.5
51.0 1 26.0 1.0
50.5 25.5 .5
0.0 0 0
American Mathematics Competitions
2005 AMC 10 B Results for Nebraska
SCORE DISTRIBUTION
score -----------grade-----------
6 7 8 9 10 unknown
---------------------------
129.0 1
125.5 1
125.0 1
117.0 1
116.0 3
115.5 1
115.0 1
113.5 2
112.5 1 1
110.0 2
109.0 1
108.0 1
106.5 1
105.5 1 2
105.0 1
104.5 1 1
103.5 1
102.5 1
102.0 2
101.5 1 2
99.5 2
99.0 1
98.5 2
98.0 1 1
97.5 1 1
97.0 1
96.5 1
96.0 1 1
95.5 1
95.0 1 1
94.5 1
94.0 1
93.5 1 1
93.0 1
92.5 3
92.0 2 3
91.5 1 2
91.0 1 1
90.0 2 2
89.0 3 5
88.0 2 3
87.5 5 4
87.0 1
86.5 2
86.0 3
85.5 1
85.0 2 2
84.5 1 1
84.0 1 4
83.5 1 2
83.0 2 1
82.5 2
82.0 1 3
81.5 1 3
81.0 1 5
80.5 3 7
80.0 2 5
79.5 3 5
79.0 2 2
78.5 2 5
78.0 7
77.5 1 2 7 1
77.0 4 4 1
76.5 1
76.0 3 5
75.5 1 2
75.0 3 8
74.5 2 7 1
74.0 1 2
73.5 2 3
73.0 1 1
72.5 4 4
72.0 3 3
71.5 1 1 5
71.0 3 8
70.5 1 2
70.0 4 2
69.5 1 4 2
69.0 2 4
68.5 2 3
68.0 1 3 3
67.5 3 6
67.0 1 2
66.5 3 4
66.0 2 1
65.5 2 6 1
65.0 2 3
64.5 1 1
64.0 6 4
63.5 1 4
63.0 4 1
62.5 3
62.0 3 1 5
61.5 2 5 1
61.0 1 1 6 1
60.5 5 1
60.0 4 2
59.5 1 3 2 1
59.0 2 1
58.5 1 1 1
58.0 4 1
57.5 1 2
57.0 1 3
56.5 2 1
56.0 1 2 1
55.5 1
55.0 1 2
54.5 3
54.0 2 2
53.5 3 1
53.0 2
52.5 2
52.0 2
51.5 1
51.0 1
50.0 2 4
49.5 1
48.5 1 1
48.0 4
47.5 1
45.5 1 1
45.0 2
44.5 1
43.5 2
42.5 2
42.0 1
41.0 1
40.0 1
39.5 1
38.5 1
36.5 1
36.0 1 3
35.5 1
33.0 1
32.5 1
32.0 1
30.5 1
30.0 1
24.5 1
22.0 1
20.0 1
American Mathematics Competitions
2005 AMC 10 B Results for Nebraska
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 8.08* 0.42 0.52 0.30 0.58 0.10 0.00
2 0.14 0.52 0.16 6.93* 0.26 1.98 0.00
3 0.02 0.70 3.47 4.37* 0.46 0.98 0.00
4 0.70 0.02 0.76 2.65* 0.26 5.61 0.00
5 0.18 0.02 7.76* 0.26 0.56 1.22 0.00
6 0.12 7.56* 0.26 0.38 0.28 1.40 0.00
7 0.76 0.66* 0.28 0.76 0.64 6.89 0.00
8 3.67* 0.24 1.06 0.04 0.16 4.83 0.00
9 0.52 0.46 2.34 4.13* 0.62 1.90 0.02
10 1.08* 0.54 0.50 0.12 0.34 7.41 0.00
11 0.30 0.50 0.12 1.52 1.20* 6.35 0.00
12 0.50 1.02 0.20 0.26 0.18* 7.84 0.00
13 0.40 0.60 1.68* 1.12 0.44 5.75 0.00
14 0.30 0.32 1.32* 1.50 0.46 6.09 0.00
15 1.12 0.44 0.46 4.53* 0.70 2.75 0.00
16 0.26 0.48 0.62 0.20* 0.06 8.38 0.00
17 0.60 1.62* 1.36 0.16 0.22 6.03 0.00
18 0.48 4.63 1.04 1.54* 0.44 1.86 0.00
19 0.62 4.41* 0.60 0.58 0.36 3.43 0.00
20 0.60 0.22 0.92* 0.30 0.38 7.58 0.00
21 0.30* 0.28 0.30 0.20 0.12 8.80 0.00
22 0.82 0.78 0.24* 0.28 0.34 7.54 0.00
23 2.38 0.32 0.46* 0.36 0.18 6.29 0.00
24 0.26 0.28 0.22 0.28 0.62* 8.34 0.00
25 0.20 0.32 2.16* 0.12 0.26 6.93 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 Nebraska
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 2
149.0 124.0 99.0
148.5 123.5 98.5 7 3
148.0 123.0 98.0
147.5 122.5 97.5 4 1
147.0 122.0 97.0 1
146.5 121.5 1 96.5
146.0 121.0 96.0 7 1
145.5 120.5 95.5 1 1
145.0 120.0 95.0 13 7
144.5 119.5 94.5 3
144.0 119.0 94.0 4 4
143.5 118.5 93.5 4 1
143.0 118.0 1 1 93.0
142.5 117.5 92.5 6 2
142.0 117.0 92.0
141.5 116.5 91.5 8 2
141.0 116.0 1 1 91.0 4
140.5 115.5 90.5 3
140.0 115.0 1 1 90.0 9 3
139.5 1 114.5 89.5 1 2
139.0 114.0 89.0 8 9
138.5 113.5 88.5
138.0 113.0 88.0 9 3
137.5 112.5 1 87.5 2 1
137.0 112.0 87.0 3 9
136.5 111.5 86.5 3 1
136.0 111.0 86.0 3
135.5 110.5 85.5 9 4
135.0 110.0 85.0 4
134.5 109.5 84.5 4 6
134.0 109.0 5 84.0 5 1
133.5 108.5 1 83.5 2 1
133.0 108.0 83.0 6 6
132.5 107.5 82.5 2
132.0 107.0 82.0 6 2
131.5 106.5 1 1 81.5 3 3
131.0 106.0 81.0 9 3
130.5 105.5 80.5 4 4
130.0 105.0 80.0 3 3
129.5 104.5 2 1 79.5 5 6
129.0 104.0 1 1 79.0 2 1
128.5 103.5 78.5 4 8
128.0 103.0 1 78.0 4 4
127.5 102.5 77.5 3 6
127.0 102.0 4 77.0 3 7
126.5 101.5 1 76.5 1 3
126.0 101.0 2 2 76.0 6 3
125.5 100.5 2 1 75.5 6
American Mathematics Competitions
2005 AMC 12 B Results for Nebraska
SCORE DISTRIBUTION
GENDER
Score # Students Score # Students Score # Students
male female male female male female
75.0 5 3 50.0 2 25.0
74.5 4 2 49.5 2 24.5
74.0 3 5 49.0 1 24.0
73.5 3 7 48.5 23.5
73.0 3 1 48.0 1 23.0
72.5 3 4 47.5 2 22.5
72.0 4 1 47.0 1 1 22.0 1
71.5 2 4 46.5 1 21.5
71.0 4 5 46.0 1 21.0
70.5 3 3 45.5 2 20.5
70.0 3 4 45.0 20.0
69.5 2 3 44.5 1 19.5 1
69.0 1 6 44.0 1 19.0
68.5 2 1 43.5 2 18.5
68.0 3 5 43.0 1 18.0
67.5 2 5 42.5 1 17.5
67.0 1 2 42.0 1 2 17.0 1
66.5 2 5 41.5 2 16.5
66.0 6 2 41.0 16.0
65.5 3 3 40.5 15.5
65.0 4 2 40.0 1 15.0
64.5 4 39.5 14.5 1
64.0 2 3 39.0 14.0
63.5 5 3 38.5 13.5
63.0 2 38.0 13.0
62.5 2 37.5 12.5
62.0 3 3 37.0 12.0 1
61.5 2 1 36.5 11.5
61.0 2 1 36.0 1 11.0
60.5 1 1 35.5 10.5
60.0 1 4 35.0 10.0
59.5 2 6 34.5 1 1 9.5
59.0 1 2 34.0 9.0
58.5 3 33.5 8.5
58.0 1 2 33.0 1 8.0
57.5 1 32.5 7.5
57.0 1 3 32.0 7.0
56.5 1 1 31.5 1 6.5
56.0 1 31.0 6.0
55.5 30.5 5.5
55.0 30.0 2 5.0
54.5 29.5 4.5
54.0 2 1 29.0 4.0
53.5 1 2 28.5 3.5
53.0 3 2 28.0 3.0
52.5 27.5 2.5
52.0 4 27.0 1 2.0
51.5 2 26.5 1.5
51.0 2 26.0 1.0
50.5 2 2 25.5 .5
0.0 0 0
American Mathematics Competitions
2005 AMC 12 B Results for Nebraska
SCORE DISTRIBUTION
score -----------grade-----------
6 7 8 9 10 11 12 13 unknown
---------------------------
139.5 1
121.5 1
118.0 2
116.0 2
115.0 1 1
112.5 1
109.0 3 2
108.5 1
107.5 1
106.5 1 1
104.5 1 1 1
104.0 2
103.0 1
102.0 1 1 2
101.5 1
101.0 1 3
100.5 1 2
99.5 1 2 1
98.5 1 2 7
97.5 3 2
97.0 1
96.0 6 2
95.5 2
95.0 3 10 7 2
94.5 3
94.0 4 4
93.5 2 3
92.5 1 6 1
91.5 1 6 5
91.0 1 3
90.5 3
90.0 6 6
89.5 1 1 1
89.0 1 9 7
88.0 1 6 5
87.5 2 1
87.0 1 1 8 3
86.5 2 2
86.0 3
85.5 1 5 7
85.0 2 2
84.5 1 1 2 6
84.0 1 2 3
83.5 2 1
83.0 2 6 5
82.5 1 1
82.0 5 2 1
81.5 2 4 1
81.0 1 8 3
80.5 1 6 2 1
80.0 1 3 2
79.5 1 9 3
79.0 1 3
78.5 1 1 1 3 6
78.0 8
77.5 1 6 2 1
77.0 7 4
76.5 2 2
76.0 5 4
75.5 1 4 1
75.0 1 4 3
74.5 4 2
74.0 5 3
73.5 8 2 1
73.0 4
72.5 1 4 2 1
72.0 2 2 2
71.5 4 2
71.0 7 2
70.5 4 2
70.0 1 4 2
69.5 4 1
69.0 3 4
68.5 1 1 1
68.0 1 6 1
67.5 1 5 1
67.0 3
66.5 1 5 2
66.0 1 6 1
65.5 1 4 1
65.0 4 2
64.5 1 3
64.0 3 2
63.5 1 4 3
63.0 1 1
62.5 1 1
62.0 2 4
61.5 2 1
61.0 1 2
60.5 2
60.0 1 1 3
59.5 1 4 3
59.0 3
58.5 1 1 1
58.0 1 1 1
57.5 1
57.0 1 2 1
56.5 2
56.0 1
54.0 1 2
53.5 1 2
53.0 1 4
52.0 1 3
51.5 2
51.0 1 1
50.5 1 1 2
50.0 2
49.5 1 1
49.0 1
48.0 2 1
47.5 1 1
47.0 1 1
46.5 1
46.0 1
45.5 1 1
44.5 1
44.0 1
43.5 2
43.0 1
42.5 1
42.0 1 2
41.5 1 1
41.0 1
40.0 1
38.5 1
36.0 1
34.5 1 1
33.0 1
31.5 1
30.0 1 1
27.0 1
22.0 1
19.5 1
17.0 1
14.5 1
12.0 1
American Mathematics Competitions
2005 AMC 12 B Results for Nebraska
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 8.39* 0.30 0.56 0.09 0.50 0.16 0.00
2 0.17 0.39 0.11 8.14* 0.25 0.94 0.00
3 0.09 0.11 8.09* 0.34 0.48 0.88 0.00
4 0.11 8.25* 0.27 0.25 0.19 0.94 0.00
5 5.64* 0.14 1.33 0.11 0.17 2.61 0.00
6 1.73* 1.03 0.52 0.47 0.28 5.97 0.00
7 0.91 1.47 0.34 1.42* 0.53 5.33 0.00
8 0.67 1.36 3.25* 0.09 0.95 3.66 0.02
9 0.41 6.08* 0.47 0.38 0.36 2.30 0.02
10 0.23 0.42 0.17 2.11 2.38* 4.67 0.02
11 1.17 0.84 0.80 4.41* 0.67 2.11 0.00
12 0.20 0.56 0.67 0.42* 0.06 8.08 0.00
13 0.45 0.31 0.39 0.75* 0.17 7.92 0.00
14 0.69 0.95 0.61 0.30 0.84* 6.61 0.00
15 0.63 0.23 0.47 4.73* 0.47 3.47 0.00
16 0.33 0.28 0.69 0.39* 0.20 8.11 0.00
17 0.33 0.45* 0.34 0.14 0.64 8.09 0.00
18 1.09 0.52 0.39* 0.20 0.16 7.64 0.00
19 0.20 0.17 0.25 0.39 1.78* 7.19 0.02
20 0.13 0.47 3.92* 0.47 1.58 3.44 0.00
21 0.22 0.30 0.44* 0.30 0.23 8.52 0.00
22 0.53 0.69 0.11 0.25 0.11* 8.31 0.00
23 0.17 0.28* 0.38 0.06 0.08 9.03 0.00
24 0.36* 0.28 0.38 0.20 0.19 8.59 0.00
25 0.25* 0.36 0.30 0.31 0.59 8.19 0.00
(*) Correct Response
(?) Response the computer was unable to read due to incomplete
erasures or two answers marked in the same column