Statistical tests compared to IBM SPSS Statistics

The formulae for the statistical tests in UNICOM Intelligence Reporter have been specifically developed for the market research industry. The tests differ from the corresponding tests offered in IBM SPSS Statistics in two main ways:

▪Overlapping data. UNICOM Intelligence Reporter allows you to run the column proportions and column means tests on overlapping data. When UNICOM Intelligence Reporter detects overlapping data in the columns being tested, it automatically uses a special formula to compensate, known as the overlap adjustment.

▪Weighted data. The statistical formulae in IBM SPSS Statistics are designed for data weighted with replication weights, which are normally integer values, whereas the statistical formulae in UNICOM Intelligence Reporter are designed for data weighted with sample weights, which are normally non-integer values.