Question

Under what circumstance are the methods of interval estimation for a population mean NOT applicable?

  

A) Nearly normal underlying population and large sample size.

   

B) Underlying distribution is not normal and the sample size is large.

   

C) Nearly normal underlying population and the sample is small.

   

D) Underlying distribution is not normal and you use a small sample size.

Answer 1

For distribution to be normal we need to have either sample size large or population to be normal

So answer here is

D) Underlying distribution is not normal and you use a small sample size.