Statistical formula for the T-test test

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The following table shows the notation used in this topic.

In the formulae for axis-level test statistics, the formula is applied separately to the counts in each column or row, according to whether the axis containing the stat= option is the row or column axis.

Notation	Description
	The number of basic count elements in the axis or segment.
	The (weighted) count in the ith cell of a row or column representing that axis.
	The (weighted) base of the row or column.
	The unweighted base of the row or column.

Sum of factors

Mean

Standard deviation

Standard error of mean

One-sample and paired T-test

is tested against Student’s t-distribution with N - 1 degrees of freedom.