Standard Deviation and Variance Statistics Calculator
Jay Tanner - 2025

Simply enter the delimited numerical data string/table and click [COMPUTE].
The numerical data elements can be separated by commas, spaces or semicolons.

The initial example data is randomly generated.  Copy/Paste/Replace with your own data.







Statistics Computed From The Above Data Table
Mathematical Expression Numerical Evaluation 

Data count
33

Data index
1 to 33

Sum of all given data
23556.9952

Arithmetic mean of population or sample
713.84833939394

 Sum of squares of all differences from mean 
65.725228843789

Population variance
1.9916736013269

Population standard deviation
± 1.4112666655622

Sample variance
2.0539134013684

Sample standard deviation
± 1.4331480737762
 
Download this PHP 7 Program: 30.3 kb - Standard Deviation Calculator