Determine the mean and standard deviation of the following frequency distribution from a sample.show your calculations.
Class
0 up to 5
5 up to 10
10 up to 15
15 up to 20
20 up to 25
Frequency
2
7
12
6
3
數學統計問題 急!!
2007-03-11 10:25 pm
回答 (1)
2007-03-11 10:39 pm
✔ 最佳答案
MEAN= (2.5X2+7.5X7+12.5X12+17.5X6+22.5X3) / (2+7+12+6+3)=380/30
=38/3
S.D=5.24(correct to 3sig.figs)
S.D用計數機計.
收錄日期: 2021-04-12 20:15:54
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