In order to calculate the z test, one must know
A) the sample's true standard deviation
B) the amount of sampling error present
C) the parameter mean, the parameter standard deviation and the sample mean
D) the exact amount of bias contained in the sample

Question

Quizplus · Accepted Answer

To conduct a z test, one must know the sample mean, the population mean, and the population standard deviation. The sample standard deviation can be used as an estimate of the population standard deviation if the sample size is large enough (n > 30) and the population standard deviation is unknown. The amount of sampling error and bias can be factors to consider, but they are not necessary to calculate the z test.

In Order to Calculate the Z Test, One Must Know