Standard Deviation Calculator

Analysis Statistical Measurement for Variables

video tutorial

Calculate average, standard deviation, the sample size for several variables. Present histogram chart and average range chart

Parameters

n - Number of values
Mean- The average
S- Sample Standard Deviation, if the list of values you entered is only a sample from the entire population, this is the best estimation for the Population Standard Deviation
S2- Sample variance, if the list of values you entered is only a sample from the entire population, this is the best estimation for the Population Variance
σ- Population Standard Deviation, if the list of values you entered is the entire population, this is the exact Standard deviation
σ2- Population Variance, if the list of values you entered is the entire population, this is the exact Variance

The outliers may influence dramatically the standard deviation result! as you may see in the sum of squares chart.
It is not recommended to exclude outliers unless you know the reason for the outlier
Variables:
data:
n (Count):
x
S:
S2:
σ:
σ2:
Skewness:
Shape:
normality pval:
outliers:

When entering data, press comma , space or Enter after each value.
Leaving empty cells is okay. The tool doesn't count empty cells or non-numeric cells.
You may use more than one variable.

tresults


Information

Target: Calculate average, standard deviation, the sample size for several variables. Present histogram chart and average range chart

Statistics

n - Number of values
Mean- The average
S- Sample Standard Deviation, if the list of values you entered is only a sample from the entire population, this is the best estimation for the Population Standard Deviation
S2- Sample variance, if the list of values you entered is only a sample from the entire population, this is the best estimation for the Population Variance
σ- Population Standard Deviation, if the list of values you entered is the entire population, this is the exact Standard deviation
σ2- Population Variance, if the list of values you entered is the entire population, this is the exact Variance

standard deviation and sample standard deviation formulas