Question

A researcher in interested in whether students who are musicians have higher intelligence test scores than students in the general population. The researcher predicts that playing a musical instrument is associated with higher intelligence test scores. This is a _____-tailed test and the zcv is _____.

Answer 1

It's two-tailed, as it's testing whether one group's grades are greater than the other. The zcv is +/-1.96. :)