Consider an x distribution with standard deviation 14 a If

Consider an x distribution with standard deviation = 14.

(a) If specifications for a research project require the standard error of the corresponding x distribution to be 2, 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 =

Solution

x-bar = / n
= 14
a)
/ n = 2.

14 / n = 2

2 n =14

n = 7

n = 49

b) / n =1.

14 / n = 1

n = 14

n = 196