In an essay of 250-500 words answer the following questions:
- What statistical test did the researchers use to determine if there was a statistically significant difference in levels of self-esteem between the boys and the girls?
- What was the purpose of calculating a Cohen's d? When is a Cohen's dcalculated? Interpret d=.90. What does it mean in this example?
- What if the researcher compared the adolescent boys before treatment and again after treating them for depression? What type of t-test would be most appropriate in this case, and why?