A fictional study was used to examine the effect of a new antianxiety drug on levels of
anxiety. Sixty participants were randomly assigned to one of two groups: 1) new
antianxiety pill and 2) placebo pill. One hour after taking the medication or placebo, all of
the participants were asked to complete the Beck Anxiety Inventory. What would be the
appropriate hypothesis testing technique to analyze the data from this study?
a. t-test for two independent samples
b. t-test for matched pairs
c. z-test for population mean
d. correlation