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Alistofnumbershasameanof8andastandarddeviationof2.5.Ifxisanumberinthelistthatis2standarddeviationsabovethemean,whatisthevalueofx答案x=8+2.5*2=13

题目详情
A list of numbers has a mean of 8 and a standard deviation of 2.5.If x is a number in the list that is 2 standard deviations above the mean,what is the value of x
答案x=_8+2.5*2=13
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答案和解析
一组数据的均值为8,标准差为2.5,如果x超过均值2倍的标准差,则x是多少?
x=8+2×2.5=13