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. 20.152, 20.86, 21.8, 20.4, 21.4, 21.0, 20.66, 21.784, 20.062, 20.6, 21.260, 20.022, 21.742, 21.472, 21.78, 21.4, 20.98, 20.72, 20.50, 21.2, 20.32, 20.96, 21.2, 20.522, 20.240, 21.0, 21.412, 20.6, 21.82, 21.4, 21.16, 21.98, 20.94, 21.514, 21.4, 20.2, 20.2, 21.510, 21.60, 21.44, 20.00, 20.844, 21.0, 21.568, 20.90, 20.2, 20.088, 21.4, 20.938, 20.6, 20.94, 20.6, 20.8, 20.2, 21.54, 20.8, 21.394, 21.430, 21.8, 20.572, 21.6, 20.972, 21.02, 21.8, 21.640, 20.02, 20.2, 21.478, 20.38, 20.24, 20.2, 20.4, 21.556, 20.02, 20.592, 20.6, 20.342, 21.6, 20.2, 21.548, 20.8, 21.98, 21.98, 20.4, 21.506, 21.8, 21.858, 21.526, 20.018, 21.478, 20.6, 21.458, 20.2, 20.932, 21.270, 21.84, 20.26, 20.4, 21.50

Statistics Computed From The Above Data Table Mathematical  Expression  Numerical  Evaluation  Data elements count 99 Data element index 1 to 99 th  indexed value of () within the data table 1 to 99 Sum of all given numerical data 2077.04 Sum of All Data Arithmetic mean (average) of sample or population 20.980202020202 Arithmetic Mean  Sum of squares of all differences from the mean  34.939331959596 Sample variance 0.356523795506 Sample Variance Standard deviation within sample ± 0.597096135899 Sample Standard Deviation Population variance 0.352922545046 Population Variance Standard deviation within population ± 0.594072844899 Population Standard Deviation

PHP Math Tool by Jay Tanner - 2025