statistics
posted by Tywania .
The following data lists the average monthly snowfall for January in 15 cities around the US:
20 9 35 46 44 17 32 25 30 14 28 14 9 15 20
Find the mean, variance, and standard deviation. Please show all of your work.

For the mean, add up all the numbers and divide by 15.
Use a formula to find variance, then take the square root of the variance for the standard deviation.