Stress has long been known to influence physical health. Visintainer, Volpicelli, and Seligman (1982) investigated the hypothesis that rats given 60 trials of inescapable shock would be less likely to later reject an implanted tumor than would rats who had received 60 trials of escapable shock or 60 no-shock trials. They obtained the following data:
What would you conclude from these data?
Answer to relevant QuestionsSuppose that in the study by Latané and Dabbs (1975), referred to in Section 19.6, only 100 males and 100 females were involved. Compute x2. Calculate the odds ratio for the 2 3 2 table from Exercise 19.7 that combines the data of Clark and Clark (1939) and Hraba and Grant (1970). In an old study by Clark and Clark (1939), black children were shown black dolls and white dolls and were asked to select one to play with. Out of 252 children, 169 chose the white doll and 83 chose the black doll. What can ...Why is rejection of the null hypothesis using a t test a more specific statement than rejection of the null hypothesis using the appropriate distribution-free test? Repeat the analysis in Exercise 20.2 using the appropriate one-tailed test. Kapp, Frysinger, Gallagher, and Hazelton (1979) have demonstrated that lesions in the amygdale can reduce certain responses commonly associated with ...
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