Games
Problems
Go Pro!

Professor Puzzler's Statistics Calculator

Provide a data set below, and find out all you need to know!
Your data points (comma separated)
Variance Detailed analysisAverageMedianModeRangeOutliersStandard deviationHarmonic meanGeometric meanQuartilesIQR

Variance

Please enter data above to calculate variance.

Explanation

Variance, like standard deviation is a measure of how tightly grouped the data is around the mean, or average. A small variance means that the data is tightly grouped, while I high variance indicates that the data is more widely spread. A variance of zero indicates that all the data points in the set are identical.

Variance is calcuated as follows. First, the average is calculated, and then each point's distance from the mean is calculated. These values are all squared and the squares are averaged.

The variance units are the square of the units being compared. For example, if you are measuring time elapsed in seconds, the variance will have units s2.

Understanding Coronavirus Spread

A Question and Answer session with Professor Puzzler about the math behind infection spread.

Blogs on This Site

Reviews and book lists - books we love!
The site administrator fields questions from visitors.
Like us on Facebook to get updates about new resources
Home
Pro Membership
About
Privacy