A researcher believes that the gender of fiction authors influences book sales online, but he is unwilling to say whether female writers have more new books sold or fewer new books sold relative to men. What would be the most appropriate type of research hypothesis in this case?
A) a one-tailed test
B) a skewness test
C) a symmetrical test
D) a two-tailed test

Question

Quizplus · Accepted Answer

A two-tailed test is appropriate because the researcher is interested in determining if there is any difference in book sales based on gender, without specifying the direction of the difference.

A Researcher Believes That the Gender of Fiction Authors Influences