Consider an x distribution with standard deviation σ = 28. (a) If specifications for a research project require the standard error of the corresponding x distribution to be 4, how large does the...

(a) If specifications for a research project require the standard error of the corresponding x distribution to be 4, how large does the sample size need to be?

n =


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

n =