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
74

Data element index
1 to 74

th  indexed value of () within the data table
1 to 74

Sum of all given numerical data
7362.521000000001
Sum of All Data

Arithmetic mean (average) of sample or population
99.493527027027
Arithmetic Mean

 Sum of squares of all differences from the mean 
5.849580445946

Sample variance
0.080131238986
Sample Variance

Standard deviation within sample
± 0.283074617346
Sample Standard Deviation

Population variance
0.079048384405
Population Variance

Standard deviation within population
± 0.281155445269
Population Standard Deviation
PHP Math Tool by Jay Tanner - 2025