Statistics Calculator
Enter your data set to instantly calculate essential statistical measures for both samples and populations.
Standard Deviation
Variance
Mean
Median
Count (N)
Sum
Additional Measures
Min
Max
Range
Mode
Frequency Distribution
Sample vs. Population
The difference lies in how "spread out" the data is considered. Population statistics use all members of a group, while Sample statistics estimate the population from a smaller subset.
The Bessels Correction
When calculating Sample Variance, we divide by (n-1) instead of n. This corrects the bias in the estimation of the population variance.
Why Standard Deviation?
Unlike variance, standard deviation is expressed in the same units as the original data, making it much easier to interpret as the "average distance" from the mean.