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
30

Data index
1 to 30

Sum of all given data
29522.681

Arithmetic mean of population or sample
984.08936666667

 Sum of squares of all differences from mean 
10.439219286666

Population variance
0.34797397622222

Population standard deviation
± 0.5898931905203

Sample variance
0.35997307885057

Sample standard deviation
± 0.59997756528938
 
Download this PHP 7 Program: 30.3 kb - Standard Deviation Calculator