What is
the main difference between a z-test and a t-test when a single sample test for
a mean is performed?

Question

Answer

For a t-test, only the sample mean is needed, whereas for a z-test only the population mean is needed.

Answer

The sample standard deviation is needed for t-test, but not for a z-test.

Answer

The
population standard deviation is needed for a z-test but is not required for a
t-test.

Answer

A z-test can only be used if the sample size is large.

Crowdly