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Psychological Statistics (Spring 2021 - 32) Homework 5 (Chapter 11) - Problem 4 Dependent Samples t-Test (Ch. 11) Study Description and Data The host of a day-time talk show with no professional training as a psychologist claims to have developed a technique for increasing positive self-regard. A skeptical psychologist designs a study to test the claims of the talk show host. The number of positive statements made about oneself is recorded for each subject during the rst meeting. After 8 weekly meetings with the talk show host, the measures are repeated for each person. Do the results of this study support the claims of the talk show host? Use a two tail test with a = .05. Number of Positive Statements D Subject Pre-Test (X 1) Post-Test (X2) X2 X1 D2 A 13 5 B 10 3 C 6 2 D 10 4 M = 9.75 M = 3.5 ED = ED2 = M D = Sample Variance (of D Scores) df=nl EDZiLEW 32: :1. df Estimated Standard Error of D Scores [32 SMD = E t Statistic = MD MD SMD Critical Value (t-Table p. 703) d f = n 1 Critical value of t = 15 Results Does cognitive psychotherapy have a statistically signicant e'ect on positive self-regard? Do the results of this study support the claims of the talk show host