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Standard deviation (STDEV)

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Mean
n
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STDEV
Cp Cpk % out of tolerance
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Calculates the STDEV (formula) of the data-set. The STDEV is an indication of the variation of the data. A small STDEV means a small variation and the data points are close to the Mean.


Interpretation

Formula

formula

95% confidence interval for STDEV

formula

To get the Confidence interval click on the graph of the data-set and it will be visible in the graph pop-up.


Legend

n = n
formula=Mean
s = STDEV

Example

The STDEV of samples in data-set A is 1.1136, this is visible in row STDEV of the result array.

Data file

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