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 the ____________ distribution.
A) z
B) t
C) neither the z nor the t distribution
D) both the z and the t distribution

Question

Quizplus · Accepted Answer

If the population is normally distributed but the sample size is small (n < 30), the distribution of the sample mean is no longer normal and instead follows a t-distribution. Therefore, a t-distribution should be used to construct the confidence interval for the population mean.

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