When the Population Is Normally Distributed,population Standard Deviation σ Is

Multiple Choice

When the population is normally distributed,population standard deviation σ is unknown,and the sample size is n = 15;the confidence interval for the population mean μ is based on:

A) The z (normal) distribution.
B) The t distribution.
C) The binomial distribution.
D) The Poisson distribution.
E) None of thesE.