Which is not an assumption of a z-test?
A)The dependent variable is perfectly normal and must involve an interval scale.
B)We know the mean of the population of raw scores under another condition of the independent variable.
C)We have randomly selected one variable.
D)We know the true standard deviation of the population.

Question

Quizplus · Accepted Answer

The assumption for a z-test does not require the dependent variable to be perfectly normal; it assumes normality in the distribution of sample means, especially as sample size increases, due to the Central Limit Theorem. The other options are actual assumptions or requirements for conducting a z-test.

Which Is Not an Assumption of a Z-Test