Distribution with standard deviation

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Consider an x distribution with standard deviation σ = 40. (For each answer, enter an exact number.)

(a) If specifications for a research project require the standard error of the corresponding distribution to be 5, how large does the sample size need to be?        

n=

(b) If specifications for a research project require the standard error of the corresponding distribution to be 1, how large does the sample size need to be?

n =

 

Reference no: EM132318297

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