Question

In Exercise 26, find the range, mean, variance, and standard deviation of
the population data set.

26. The ages of the Supreme Court justices as of December 22, 2016 (Source:
Supreme Court of the United States)
61 80 68 83 78 66 62 56

Answer 1

given population data

x: 61, 80, 68, 83, 78, 66, 62, 56 N = 8

Range = highest observation - lowest observation

mean = sum of the observations / total number of observations

variance = sum of squared deviations from the mean / total number of observations

standard deviation = square root of variance

calculations given below.