The table below shows a crosstab of a Number question, NPS, by a date question.
By default, with time series data Displayr compares to all the other time periods (see Testing the Complement of a Cell). For example, the significant red arrow for January 2011 is telling us that the NPS for that month is below the overall average.
Displayr can also be instructed to compare each month to the previous month. This is done by selecting Compare to previous period in the Date questions setting in Statistical Assumptions). This is illustrated in the table below.
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How to Apply Significance Testing in Displayr
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