When Using a Z-Test for Comparing a Sample Mean Against

Multiple Choice

When using a z-test for comparing a sample mean against a standard,one must consider all of the following EXCEPT whether the

A) variance of the variable in the population is known or unknown.
B) distribution of the variable in the population is normal (or at least symmetrical) or asymmetrical.
C) mean falls within an acceptable confidence interval.
D) sample size is small or large.
E) All of the above must be considered.