Practice Exam Problem 5

5. A researcher runs a test to determine if The Ofce or Parks and Recreation is a better show. He decides to operationally dene \"better\" by virtue of the number of times viewers laugh while watching the show. His null hypothesis is that there will be no difference between these shows. After he conducts an independent samples ttest, his conclusion is that the null hypothesis is true, seeing as his tobtained value did not exceed his tcritical-value. But in reality, the null hypothesis is false! a. What has the researcher done? (4 points). i. Committed a Type 1 error ii. Committed a Type 2 error b. Which of these would help him avoid a similar error if he did the study again? (2 points). i. Increasing power ii. Decreasing alpha (going from .05 in the prior e'hu'lv 17': \"1 in H19 1191]? ufnrlv'i