2. Consider the summary data below: Weight (pounds) Girl Before After Change 1 80.5 82.5 2.0 2 84.9 85.6 0.7 3 81.5 81.4 -0.1 4 82.6 81.9 -0.7 5 79.9 76.4 -3.5 n=5 n=5 n=5 mean=81.88 mean=81.56 mean= sd=1.98 sd=3.32 sd= 2.04 a. Calculate the mean change in weight. -0.32 pounds b. Estimate the true mean weight change with a 95% CI. Interpret your result - can we conclude that the therapy is effective? c. Perform the hypothesis test for the data described above. If alpha is 0.05, is there any evidence that the therapy is effective? Provide the t statistic, degrees of freedom, and p- value in your answer. 3. A recent study evaluated how addicted teenagers become to nicotine once they start smoking. The response variable was based off a questionnaire called the Hooked on Nicotine Checklist (HONC). Each HONC score is between 0 and 10, where higher scores indicate that the teenager is more hooked. The teenagers self-classified themselves as 'inhalers' or 'noninhalers.' Perform a hypothesis test to determine if the level of addiction differs by whether or not the teenagers inhaled the smoke. Assume that assumptions are satisfied for valid inference. Inhalers Noninhalers n 237 95