題目列表(包括答案和解析)
分組 | [29.86,29.90) | [29.90,29.94) | [29.94,29.98) | [29.98,30.02) |
頻數(shù) | 12 | 63 | 86 | 182 |
分組 | [30.02,30.06) | [30.06,30.10) | [30.10,30.14) | |
頻數(shù) | 92 | 61 | 4 |
分組 | [29.86,29.90) | [29.90,29.94) | [29.94,29.98) | [29.98,30.02) |
頻數(shù) | 29 | 71 | 85 | 159 |
分組 | [30.02,30.06) | [30.06,30.10) | [30.10,30.14) | |
頻數(shù) | 76 | 62 | 18 |
甲廠 | 乙廠 | 合計(jì) | |
優(yōu)質(zhì)品 | |||
非優(yōu)質(zhì)品 | |||
合計(jì) |
p(x2≥k) | 0.05 | 0.01 |
k | 3.841 | 6.635 |
序號 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
數(shù)學(xué) | 95 | 75 | 80 | 94 | 92 | 65 | 67 | 84 | 98 | 71 | 67 | 93 | 64 | 78 | 77 | 90 | 57 | 83 | 72 | 83 |
物理 | 90 | 63 | 72 | 87 | 91 | 71 | 58 | 82 | 93 | 81 | 77 | 82 | 48 | 85 | 69 | 91 | 61 | 84 | 78 | 86 |
數(shù)學(xué)成績優(yōu)秀 | 數(shù)學(xué)成績不優(yōu)秀 | 總計(jì) | |
物理成績優(yōu)秀 | |||
物理成績不優(yōu)秀 | |||
總計(jì) | 20 |
n(ad-bc)2 |
(a+b)(c+d)(a+c)(b+d) |
P(K2≥k) | 0.100 | 0.050 | 0.025 | 0.010 | 0.001 |
k | 2.706 | 3.841 | 5.024 | 6.635 | 10.828 |
體育運(yùn)動 性別 |
參加 | 不參加 | 總計(jì) |
男生 | 310 | 142 | 452 |
女生 | 94 | 64 | 158 |
總計(jì) | 404 | 206 | 610 |
分組 | [29.86,29.90) | [29.90,29.94) | [29.94, 29.98) |
[29.98, 30.02) |
[30.02, 30.06) |
[30.06, 30.10) |
[30.10, 30.14) |
頻數(shù) | 12 | 63 | 86 | 182 | 92 | 61 | 4 |
分組 | [29.86, 29.90) |
[29.90, 29.94) |
[29.94, 29.98) |
[29.98, 30.02) |
[30.02, 30.06) |
[30.06, 30.10) |
[30.10, 30.14) |
頻數(shù) | 29 | 71 | 85 | 159 | 76 | 62 | 18 |
甲廠 | 乙廠 | 合計(jì) | |
優(yōu)質(zhì)品 | |||
非優(yōu)質(zhì)品 | |||
合計(jì) |
n(n11n22-n12n21)2 |
n1+n2+n+1n+2 |
p(x2≥k) |
k |
0.050.01 |
3.8416.635 |
序號 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
數(shù)學(xué)成績 | 95 | 75 | 80 | 94 | 92 | 65 | 67 | 84 | 98 | 71 | 67 | 93 | 64 | 78 | 77 | 90 | 57 | 83 | 72 | 83 |
物理成績 | 90 | 63 | 72 | 87 | 91 | 71 | 58 | 82 | 93 | 81 | 77 | 82 | 48 | 85 | 69 | 91 | 61 | 84 | 78 | 86 |
數(shù)學(xué)成績優(yōu)秀 | 數(shù)學(xué)成績不優(yōu)秀 | 合計(jì) | |
物理成績優(yōu)秀 | |||
物理成績不優(yōu)秀 | |||
合計(jì) | 20 |
y1 | y2 | 合計(jì) | |
x1 | a | b | a+b |
x2 | c | d | c+d |
合計(jì) | a+c | b+d | a+b+c+d |
n(ad-bc)2 |
(a+b)(c+d)(a+c)(b+d) |
P(K2≥k0) | 0.50 | 0.40 | 0.25 | 0.15 | 0.10 | 0.05 | 0.025 | 0.010 | 0.005 | 0.001 |
k0 | 0.455 | 0.708 | 1.323 | 2.072 | 2.706 | 3.841 | 5.024 | 6.635 | 7.879 | 10.828 |
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