Posted by glenzy on Friday, February 22, 2013 at 11:47am.
What is the standard deviation of 31 sample values with a mean of 2954?

statistics  PsyDAG, Saturday, February 23, 2013 at 1:37pm
Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.
Standard deviation = square root of variance