A researcher wishes to study the effect of cognitive behavior therapy on young people diagnosed with depression. Consider and discuss the following questions as you respond:

• Would you recommend using a z test, a t test, or an ANOVA 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 nondirectional?
• Would the test be one or two tailed?
• How would the null and alternative hypotheses be worded?