1楼巍巍爸爸
(又见旺旺，心情愉快！)
发表于 2010-1-6 11:29
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全球amc8的总体情况
2009 Report for All Participants
Number of schools returning results 2372（参加学校总数）
Average of school highest score 17.83（学校最高平均分）
Average school team score 48.72（团体平均分）
# of Student Participants 150733（总人数）
Overall Average Score 10.28（平均分）
Average Score by Grade level（各年级人数、平均分）
Grade # of Students Average
5th 3874 9.45
6th 20688 9.17
7th 50218 10.08
8th 73220 10.82
Number of Female Students 68149（女生人数）
Average Score of Female Students 9.66（女生平均分）
Average Female Scores by Grade（女生各年级人数、平均分）
Grade # of Students Average
5th 1445 8.42
6th 9157 8.57
7th 22725 9.44
8th 34137 10.17
Number of Male Participants 79138（男生人数）
Average Score of Male Participants 10.85（男生平均分）
Average score for Males by Grade（男生各年级人数、平均分）
Grade # of Students Average
5th 2396 10.08
6th 11221 9.66
7th 26710 10.64
8th 37724 11.43
2009 MAA - American Mathematics Contest 8
Number of Students Achieving Indicated Score（各分数段人数）
SCORE MALE FEMALE TOTAL*
25 140 21 163
24 217 52 271
23 316 73 392
22 451 147 603
21 587 192 792
20 913 302 1229
19 1172 473 1663
18 1697 701 2423
17 2147 1071 3262
16 2841 1508 4417
15 3613 2043 5776
14 4461 2938 7546
13 5594 3862 9684
12 6658 5278 12209
11 7612 6463 14394
10 8429 7466 16280
9 8195 8018 16621
8 7589 7817 15810
7 6278 7019 13654
6 4685 5363 10304
5 2876 3725 6776
4 1571 2083 3750
3 670 998 1707
2 251 361 627
1 61 75 142
0 (@) 9 17 27
0 ($) 105 83 211
(@) These students attempted some of the problems
($) These students attempted none of the problems
(*) Total includes students who failed to mark their gender
2009MAA - American Mathematics Contest 8
Number of Students by Grade
Achieving indicated Score（各年级分数段人数）
SCORE 5th Grade 6th Grade 7th Grade 8th Grade
25 2 15 38 108
24 4 14 73 176
23 8 26 106 250
22 11 38 162 388
21 13 60 241 472
20 22 77 366 749
19 38 111 461 1035
18 49 171 722 1460
17 77 238 959 1955
16 89 342 1327 2612
15 151 520 1782 3251
14 177 706 2386 4162
13 215 1022 3053 5260
12 241 1370 4038 6359
11 322 1791 4779 7226
10 318 2120 5545 8000
9 389 2408 5694 7800
8 386 2547 5482 7063
7 393 2309 4664 5996
6 325 1955 3666 4139
5 270 1385 2421 2540
4 192 843 1304 1323
3 108 384 607 571
2 46 158 212 204
1 12 40 48 41
0(@) 2 8 8 7
0($) 14 30 74 73
(@) These students attempted some of the problems
($) These students attempted none of the problems
Note: Some students failed to indicate a grade
Table of Item Difficulty for the 2009
MAA - American Mathematics Contest 8
Tabulation of responses by 150733 Students
Percent of Responses（各题解答率）
ITEM A B C D E OMITS ?
____ _____ _____ _____ _____ _____ _____ _____
1 0.15 0.23 2.63 2.03 94.77* 0.18 0.01
2 2.58 3.32 3.46 87.53* 2.58 0.51 0.01
3 11.80 2.72 82.15* 1.57 1.45 0.27 0.02
4 9.05 68.36* 2.54 9.94 9.36 0.69 0.06
5 5.62 14.14 16.10 58.24* 4.08 1.78 0.04
6 68.39* 8.52 7.78 5.37 8.46 1.42 0.04
7 2.51 8.78 39.38* 19.53 27.31 2.40 0.08
8 26.97 27.27* 35.24 3.88 5.33 1.25 0.05
9 14.73 37.85* 17.96 18.16 7.99 3.25 0.06
10 3.61 25.94 13.67 47.95* 7.56 1.23 0.04
11 6.16 15.45 23.63 33.25* 16.54 4.92 0.06
12 17.98 24.75 5.42 43.15* 7.06 1.56 0.07
13 6.96 74.85* 5.42 8.19 2.83 1.69 0.06
14 5.46 12.91* 70.16 5.18 3.46 2.78 0.05
15 15.73 13.20 16.26 32.43* 17.78 4.51 0.09
16 32.03 15.95 18.66 14.60* 13.69 4.99 0.08
17 15.54 23.76* 22.78 18.31 11.51 8.01 0.09
18 21.59 11.02 39.92* 12.41 9.31 5.62 0.12
19 12.00 15.25 18.57 22.99* 23.55 7.40 0.24
20 18.75 29.19 13.00 18.86* 12.32 7.78 0.10
21 14.62 36.64 17.27 14.00* 6.73 10.62 0.12
22 11.18 13.86 18.83 22.53* 23.57 9.79 0.24
23 11.98 27.59* 17.23 20.95 10.31 11.78 0.17
24 16.71 18.57 20.92 15.48 15.42* 12.76 0.14
25 13.11 16.37 19.03 16.40 20.23* 14.76 0.11
(*) Correct Response
(?) Response the computer was unable to read due to incomplete
erasures or two answers marked for the same problem.
