Question

Consider an x distribution with standard deviation σ = 10.

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

Answer 1

standard error is given by SE- o where n is the sample size and Thus n= (s a) 10, SE 5 Hence n - (10/ 5) is the standard deviation 2 n 4 b) r-10, SE 1 2 Hence n = (10 / 1) n 100