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The purpose of performing a significance test can vary but the most common purpose is to identify differences between subgroups or subgroup’s results compared to the totals in the survey. Significance testing can be performed for comparisons of proportions or for comparisons of mean values.
Significance (Z test) tests can be used in StoryTeller charts; The test can be performed in both mean values and in proportions. It can also, for instance, be performed between brands, target groups and time periods. To enable significance test in a chart, under Analysis tab, go to Statistical analysis menu and enable significance tests, as shown in the image below.