Question 1:

Weight loss: In a study to determine whether counseling could help people lose weight, a sample of people experienced a group-based behavioral intervention, which involved weekly meetings with a trained interventionist for a period of six months. The following data are the numbers of pounds lost for 14 people. Assume the population is approximately normal. Perform a hypothesis test to determine whether the mean weight loss is less than 18 pounds. Use the 0:: 0.01 level of significance and the P-value method with the TI84 Plus calculator. 21.9 27.9 7.1 23.4 20.7 12.4 16.7 20.5 37.0 33.1 11.6 35.6 23.2 18.7 Send data to Excel Part: 0 / 5 Part 1 of 5 (a) State the appropriate null and alternate hypotheses. H0: l | I:II:I EI=EI H1: 11 I:II:I M This hypothesis test is a (Choose one) V test. X \\(3 Midi ' Find the critical value(s). Round the answer(s) to at least three decimal places. If there is more than one critical value, separate them with commas. Cnucal value\"): I ' ' Put!!! _ Midi Compute the value of the test statistic. Round the answer to at least two decimal places. I - 1 Interpreting calculator display: The following TI84 Plus display presents the results of a hypothesis test. u