Standard Deviation Calculator

Use this app to calculate the standard deviation of a set of values.

It will also return the: -mean(average) -variance -population deviation -Median -Q1 & Q3

To add a value to the set press "+Row". When all data are in press "Calculate". Note: Population deviation (n-1) is unbiased, while normal standard deviation (n) is biased.

To calulate the z-score enter a number into the z-score tab, then click find z-score. The z-score will be based off the main table.