A psychologist wants to know if spending a summer at a racially integrated day-camp would affect racial attitudes. She decides to test 23 camp applicants on a scale of prejudice before and after their day-camp experience. She found that the average difference in their racism score was D (before - after) = -1.26, with SS = 65.98. Conduct a two-tailed t-test to see if there is a significant change in racism. Set alpha at .01. a) What are the null and alternative hypotheses? Ho: H1: b) What is the critical value? c) Conduct the appropriate t-test. Show your work below. e) What were the results in plain English? d) What is the r2? What does this mean in plain English?