Variance and Standard Deviation Statistics Calculator
PHP Program by Jay Tanner

Simply enter the delimited numerical data table/string 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 table.






Statistics Computed From The Above Data Table
Mathematical  Expression Numerical  Evaluation 

Data elements count
31

Data element index
1 to 31

th  indexed value of () within the data table
1 to 31

Sum of all given numerical data
2988.460999999999
Sum of All Data

Arithmetic mean (average) of sample or population
96.401967741935
Arithmetic Mean

 Sum of squares of all differences from the mean 
23.793000967742

Sample variance
0.793100032258
Sample Variance

Standard deviation within sample
± 0.890561638663
Sample Standard Deviation

Population variance
0.76751616025
Population Variance

Standard deviation within population
± 0.87607999649
Population Standard Deviation
PHP Math Tool by Jay Tanner - 2026