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
72

Data element index
1 to 72

th  indexed value of () within the data table
1 to 72

Sum of all given numerical data
1637.507999999999
Sum of All Data

Arithmetic mean (average) of sample or population
22.743166666667
Arithmetic Mean

 Sum of squares of all differences from the mean 
92.759006

Sample variance
1.306464873239
Sample Variance

Standard deviation within sample
± 1.143006943653
Sample Standard Deviation

Population variance
1.288319527778
Population Variance

Standard deviation within population
± 1.135041641429
Population Standard Deviation
PHP Math Tool by Jay Tanner - 2026