Pt 4

For the following question circle your answers and show all work. Unless otherwise noted, solutions without work or reasoning may not receive credit (unless computation was done on the calculator) Special note for hypothesis testing questions: You may use either the p-value method or the rejection region method unless otherwise indicated. Use a significance level of 0.05 if one is not provided. Please show the following for full credit: The null and alternative hypotheses The p-value or the rejection region and test statistic The decision (reject or fail to reject HO) The interpretation in terms of the original situation 10. (10 points) A team of heart surgeons at Saint Ann's Hospital knows that many patients who undergo corrective heart surgery have a dangerous buildup of anxiety before their scheduled operations. The staff psychiatrist at the hospital has started a new counseling program intended to reduce this anxiety. A test of anxiety is given to patients who know they must undergo heart surgery. Then each patient participates in a series of counseling sessions and is retested to determine anxiety level. The table shows the results for a random sample of nine patients. Higher scores mean higher levels of anxiety. From the given data, can we conclude that the counseling sessions reduce anxiety? Use a 0.01 level of significance. Patient 1 2 3 4 5 6 7 8 9 Score 88 92 105 115 89 98 85 72 100 before counseling Score 76 93 68 117 82 84 79 67 86 After counseling