9. A researcher is comparing a treatment population to past data a out average length of time to complete a paragraph (at least 10 minutes) and wants to test the null hypothesis: Ho10 at a significance level of 5%. The researcher is planning on independently sampling 29 students. a. What is the alternative hypothesis? b. What are the degrees of freedom for the t-distribution in the test statistic? c. Determine the Critical Value(s) and write the decision rule. The researcher has determined if |-| = 2, the power of the test would be 60%. Determine the effect of making the following changes in the experiment and test (circle one answer for each): i. Change the significance level from 5% to 1%: increase power ii. Change the sample size from 29 to 20: increase power reduce power reduce power no effect no effect 111. Instead of |-|=2, calculate power for | -M.|=3: increase power reduce power no effect