抽取件數(shù)(件) |
100 |
150 |
200 |
500 |
800 |
1000 |
合格頻數(shù) |
88 |
141 |
176 |
445 |
720 |
900 |
合格頻率 |
______ |
0.94 |
0.88 |
0.89 |
0.90 |
______ |
求證:AC2 =AD·AE .