The answer is not A or B 5 The distribution of the sample me

The answer is not A or B

5. The distribution of the sample means x can be approximated if: a) n = 20. The distribution is not Normal b) n = 38. The distribution is not normal with . c) n = 16. The distribution is normal with= p and= a . d) n = 25. The distribution is normal

Solution

the correct choice is (d)

since

for nomal distribution

mean Ux = u and sigma(x) = sigma/sqrt(n)