Question: Do nice guys really finish last Refer to the Nature

Do nice guys really finish last? Refer to the Nature (March 20, 2008) study of whether "nice guys finish last," Recall that Boston-area college students repeatedly played a version of the game "prisoner's dilemma," where competitors choose cooperation, defection, or costly punishment. At the conclusion of the games, the researchers recorded the average payoff and the number of times punishment was used for each player. Based on a scatterplot of the data, the simple linear regression relating average payoff (y) to punishment use (x) resulted in SSE = 1.04.
a. Assuming a sample size of n = 28, compute the estimated standard deviation of the error distribution, s.
b. Give a practical interpretation of s.

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