9.4 9.9 9.9 9.9 10.0 10.2 10.2 10.5
The mean and the standard deviation of the 8 number shown are 10.0 and 0.3. What percent of the 8 numbers are within 1 standard deviation of the mean?
90%
85%
80%
75%
70%
还是不会做!
What percent of the 8 numbers are within 1 standard deviation of the mean?
这句的具体意思是什么呢?
拜谢
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