During the development of UNICOM Intelligence Reporter, the algorithms for statistical formulae were rewritten, and the revised formulae were reviewed by IBM Corp. statisticians. Although the formulae appear very different to those used in Quantum and Quanvert, tests have shown that they give comparable p values.

This section provides a comparison of the formulae in UNICOM Intelligence Reporter and Quantum/Quanvert.

In the column proportions test, where the data are not overlapping, the denominator of t = sqrt(term), where term is

in UNICOM Intelligence Reporter:

in Quantum/Quanvert:

Where there is overlap, the denominator of t = sqrt(term), where term is

in UNICOM Intelligence Reporter:

in Quantum/Quanvert:

In some cases, slight differences will be seen in your results as borderline cases that are significant using the UNICOM Intelligence Reporter formula might not be significant using the Quantum/Quanvert formula.

in UNICOM Intelligence Reporter:

DF = e 1 + e 2 - e 0 - 2

in Quantum/Quanvert:

DF = e 1 + e 2 - e 0 - 1

To reproduce the Quantum/Quanvert formula, do one of the following

For full details of the UNICOM Intelligence Reporter - Survey Tabulation formula, see Statistical formula for the column proportions test. For full details of the UNICOM Intelligence Professional formula, see Statistical formula for the column proportions test.

Degrees of freedom:

in UNICOM Intelligence Reporter:

DF = e 1 + e 2 - e 0 - 2

in Quantum/Quanvert:

DF = e 1 + e 2 - e 0 - 1

To reproduce the Quantum/Quanvert formula, do one of the following:

For full details of the UNICOM Intelligence Reporter formula, see Statistical formula for the column means test.

In the paired preference test, the denominator of t = sqrt(term), where term is

in UNICOM Intelligence Reporter:

in Quantum/Quanvert:

where

For full details of Quantum and Quanvert formulas, see the Quantum User's Guide or the Quanvert User's Guide.

Kish, L. Survey Sampling. New York: John Wiley and Sons. ISBN 0-471-48900-X.