Question 1167730
not sure what the rule is, however:


i get:


mean = sum(x) / 4 = 89
sum of squared deviations from the mean = sum(x-m)^2 = 248


population variance = 248/4 = 62
population standard deviation = sqrt(62) = 7.874007874


sample variance = 248/3 = 82.66666667
sample standard deviation = 9.092121131


what you are showing is the sample variance and sample standard deviation.


if that's what you wanted to show, then you got the right answers.