甲 | 10 | 8 | 6 | 9 | 7 | 6 | 10 |
乙 | 10 | 9 | 8 | 6 | 7 | 8 | 8 |
![]() | -9 | -6 | -5 | -2 | 2 | 5 | 6 | 9 |
![]() | -9 | -7 | -5 | -3 | 3 | 5 | 7 | 9 |
A.![]() | B.![]() | C.![]() | D.![]() |
A.身高一定是145.83cm | B.身高在145.83cm以上 |
C.身高在145.83cm左右 | D.身高在145.83cm以下 |
| y1 | y 2 | 合计 |
x1 | a | 21 | 73 |
x2 | 22 | 25 | 47 |
合计 | b | 46 | 120 |
A.![]() | B.![]() | C.![]() | D.![]() ![]() |
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