7.对一批衬衣进行抽检,统计合格衬衣的件数,得到合格衬衣的频数表如表:
估计任抽一件衬衣是合格品的概率0.95.
0 288884 288892 288898 288902 288908 288910 288914 288920 288922 288928 288934 288938 288940 288944 288950 288952 288958 288962 288964 288968 288970 288974 288976 288978 288979 288980 288982 288983 288984 288986 288988 288992 288994 288998 289000 289004 289010 289012 289018 289022 289024 289028 289034 289040 289042 289048 289052 289054 289060 289064 289070 289078 366461
| 抽取件数(件) | 50 | 100 | 200 | 500 | 800 | 1000 |
| 合格频数 | 47 | 93 | 189 | 489 | 760 | 950 |