| B | 总计 | |
A | 39 | 157 | 196 |
29 | 167 | 196 | |
总计 | 68 | 324 | 392 |
| Y1 | Y2 | 总计 |
X1 | a | b | a+b |
X2 | c | d | c+d |
总计 | a+c | b+d | a+b+c+d |
年份 | 1985 | 1986 | 1987 | 1988 | 1989 | 1990 | 1991 | 1992 |
x(kg) | 70 | 74 | 80 | 78 | 85 | 92 | 90 | 95 |
y(t) | 5.1 | 6.0 | 6.8 | 7.8 | 9.0 | 10.2 | 10.0 | 12.0 |
| ||||||||
年份 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | |
x(kg) | 92 | 108 | 115 | 123 | 130 | 138 | 145 | |
y(t) | 11.5 | 11.0 | 11.8 | 12.2 | 12.5 | 12.8 | 13.0 | |
分组 | [29.86,29.90) | [29.90,29.94) | [29.94,29.98) | [29.9830.02), | [30.02,30.06) | [30.06,30.10) | [30.10,30.14) |
频数 | 12 | 63 | 86 | 182 | 92 | 61 | 4 |
分组 | [29.86,29.90) | [29.90,29.94) | [29.94,29.98) | [29.9830.02), | [30.02,30.06) | [30.06,30.10) | [30.10,30.14) |
频数 | 29 | 71 | 85 | 159 | 76 | 62 | 18 |
| 甲厂 | 乙厂 | 合计 |
优质品 | | | |
非优质品 | | | |
合 计 | | | |
P(χ2≥x0) | 0.05 | 0.01 |
x0 | 3.841 | 6.635 |
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