The t value is used for many tests instead of the z value because:
A)it is easier to calculate and to interpret.
B)it is more widely known among statisticians.
C)assumptions of the z value are violated if sample size is 30 or less.
D)it is available on statistical software packages.
E)assumptions of the t value are violated if the sample size is 10 or less.

Question

Quizplus · Accepted Answer

The assumptions of the z value are violated if sample size is 30 or less, which is why the t value is used for smaller sample sizes.

The T Value Is Used for Many Tests Instead of the Z