*54*

A

**one sample z-test**is used to test whether or not the mean of a population is equal to some value when the population standard deviation is known.To perform a one sample z-test, simply fill in the information below and then click the “Calculate” button.

**z = ** 0.3232

**p-value (one-tailed) = ** 0.1245

**p-value (two-tailed) = ** 0.3232