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.
What's new (v2.1)
This update from Apple will improve the functionality of this app. No new features are included.
Fixed some calculation issues with the five number summary.
Small UI changes