QTAB Significance Testing Library

QTAB's post processing instructions provide a flexible means for manipulating and formatting table rows, columns and individual cells after tabulation.

To meet a common request, we have assembled a library of post processing instructions that may be used to perform significance testing between any pairs of columns. Proportions are tested using z-scores and means are tested using t-tests.

Both one-way (A is compared to B and A is flagged) and two-way (A and B are compared and the cell with the larger frequency is flagged) tests are provided.

Sample specifications with extensive annotations are provided to use as a guide, along with the listing and tables generated.  They contain information on setting confidence levels and on changing percentage bases for testing proportions.

QT32DST1.ZIP (72K) contains the QTAB significance testing library and sample specs, along with an Excel spreadsheet to test your results (updated 5/12/1999).

This library will work with the demo version of QTAB.