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
70

Data element index
1 to 70

th  indexed value of () within the data table
1 to 70

Sum of all given numerical data
3425.440000000001
Sum of All Data

Arithmetic mean (average) of sample or population
48.934857142857
Arithmetic Mean

 Sum of squares of all differences from the mean 
194.391380571429

Sample variance
2.817266385093
Sample Variance

Standard deviation within sample
± 1.678471443038
Sample Standard Deviation

Population variance
2.777019722449
Population Variance

Standard deviation within population
± 1.66643923455
Population Standard Deviation
PHP Math Tool by Jay Tanner - 2025