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. 100.4, 100.984, 98.36, 101.80, 100.40, 98.884, 100.600, 101.2, 101.2, 98.0, 99.6, 100.60, 99.6, 99.40, 99.6, 99.12, 100.040, 99.20, 100.0, 99.6, 99.2, 101.708, 99.48, 100.80, 98.36, 100.8, 98.216, 98.0, 98.0, 100.0, 100.216, 100.04, 101.6, 100.904, 98.8, 100.952, 101.60, 100.40, 101.96, 98.0, 100.84

Statistics Computed From The Above Data Table Mathematical  Expression  Numerical  Evaluation  Data elements count 41 Data element index 1 to 41 th  indexed value of () within the data table 1 to 41 Sum of all given numerical data 4098.464000000001 Sum of All Data Arithmetic mean (average) of sample or population 99.962536585366 Arithmetic Mean  Sum of squares of all differences from the mean  54.440664195122 Sample variance 1.361016604878 Sample Variance Standard deviation within sample ± 1.166626163292 Sample Standard Deviation Population variance 1.32782107793 Population Variance Standard deviation within population ± 1.15231118971 Population Standard Deviation

PHP Math Tool by Jay Tanner - 2025