Survey Tabulation > Statistical tests > T-test test > Statistical formula for the T-test test
 
Statistical formula for the T-test test
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.
See also
Example of the T-test test
Details and restrictions of the T-test test
T-test test