Compute the standard deviation for the set of sample data

93, 83, 77, 77, 83

Round the answer to three decimal places.

Question

Compute the standard deviation for the set of sample data

93, 83, 77, 77, 83

Round the answer to three decimal places.

anonymous · Answer

find the variance and take the square root

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

Xavier is right, so the answer is 6.993