A parametric inferential statistical test of the null hypothesis for a single sample where the population variance is not known is the
A)z test.
B)t test.
C)Cohen's d.
D)standard error of the mean.

Question

A parametric inferential statistical test of the null hypothesis for a single sample where the population variance is not known is the
A)z test.
B)t test.
C)Cohen's d.​
D)standard error of the mean.

Quizplus · Accepted Answer

The t test is the appropriate parametric inferential statistical test for a single sample when the population variance is not known. The z test is used when the population variance is known. Cohen's d is a measure of effect size, not a statistical test. The standard error of the mean is not a test, but rather a measure of variability in the sample mean.

A Parametric Inferential Statistical Test of the Null Hypothesis for a Single