You are interested in the role of social support in immune f

You are interested in the role of social support in immune function among retired men who live alone. You ask 50 patients to record the number of days they do not see or interact with a friend or family member over a period of one month to see whether the number of nonsocial days in a typical month correlates with the number of new illnesses per year. You calculate the Pearson correlation coefficient, r = 0.33, and conduct a test of its significance. You find that the correlation is significant at alpha = .05. Suppose you want to predict the number of illnesses per year based on the number of nonsocial days in a month among elderly men who live alone. The coefficient of determination is r^2 = 0.33, indicating that 11% of the variability in the number of illnesses per year can be explained by the relationship between the number of illness per year and the number of nonsocial days in a month.

Solution

coeff of determination = r^2 = 0.1089 which means that 10.89% of variability in number if illness...