Question

Compute the standard deviation for the set of sample data

93, 83, 77, 77, 83

Round the answer to three decimal places.

Answer 1

find the variance and take the square root

Answer 2

You find the mean: xbar
Then you find the sum of the squared deviations:
(93-xbar)^2+(83-xbar)^2+...
Since this is sample data, we divide that sum by n-1 where n is the number of samples
Then take the square root

Answer 3

well better if i say n is the sample size i guess

Answer 4

http://en.wikipedia.org/wiki/Computational_formula_for_the_variance

Answer 5

Xavier is right, so the answer is 6.993