PSY 325 Statistics for the Behavior and Social Sciences

A researcher wishes to study the effect of a new drug on blood pressure.  Would you recommend using a z-test, a t-test, or an A.N.O.V.A. for the analysis?  Explain your answer. What would your choice of test depend on?  For the test you select, explain your design and your comparison groups.  Would the hypothesis be directional or non-directional?  Would the test be one-tailed or two-tailed?  What would be the null and what would be the alternative hypothesis?