When constructing a confidence interval for a population mean,if a population is normally distributed and a small sample is taken,then the distribution of is based on _____ distribution.
A)z
B)t
C)Neither
D)Both A and B

Question

When constructing a confidence interval for a population mean,if a population is normally distributed and a small sample is taken,then the distribution of  is based on _____ distribution.
A)z 
B)t 
C)Neither 
D)Both A and B

Quizplus · Accepted Answer

If a small sample is taken (< 30) and the population is normally distributed, the distribution of the sample mean will follow a t-distribution with n-1 degrees of freedom.

When Constructing a Confidence Interval for a Population Mean,if a Population