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Standard Deviation Calculator. Standard Deviation (SD) is the measure of spread of the numbers in a set of data from its mean value. It is also called as SD and is represented using the symbol Ï (sigma). This can also be said as a measure of variability or volatility in the given set of data. Find the mean, variance and SD of the given numbers using this free arithmetic standard deviation calculator online. Enter an 'n' number of values in the calculator and find the SD (Ï), mean and variance. Standard Deviation Calculator Enter all the numbers separated by comma ','.
Estimates standard deviation based on a sample. The standard deviation is a measure of how widely values are dispersed from the average value (the mean). Important: This function has been replaced with one or more new functions that may provide improved accuracy and whose names better reflect their usage.