Everyone experiences “ups and downs” in life satisfaction. Boehm, Winning, Segerstrom, and Kubzansky (2015) studied whether such variability in life satisfaction is correlated with mortality rate. Over a nine-year period, 4,458 Australian older adult participants answered surveys about life satisfaction, and the researchers recorded whether the participants were deceased at the time of planned follow-up interviews. Participants rated their life satisfaction on a scale of 0 (dissatisfied) to 10 (satisfied). The researchers observed data similar to the following:

a. Compute M, SS, s² , and s for these samples.

b. Report the mean and standard deviation in a format that is appropriate for a scientific journal. 

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Low Mortality Sample 1 6 6 7 6 5 5 3 8 3 5 High Mortality Sample 0 10 10 4 9 3 0 10 2 3 4