If you are conducting research and do not know the standard deviation of the underlying population, which of the tests below would you immediately not be able to use?
A) Single-sample t-test
B) One-way ANOVA
C) Any non-parametric test
D) Z-test

Question

Quizplus · Accepted Answer

The Z-test requires knowledge of the population standard deviation, so it cannot be used when the standard deviation is unknown. However, the single-sample t-test and one-way ANOVA can be used with an estimated standard deviation, while non-parametric tests do not rely on assumptions about the population's distribution or standard deviation, so they can be used as well.

If You Are Conducting Research and Do Not Know the Standard