Posted by Anthony on .
What is the standard deviation to two decimal places for the following data:
4 6 7 4 5

Math 
PsyDAG,
Find the mean first = sum of scores/number of scores
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
I'll let you do the calculations.