Surveys & Statistics

Percentage points measure the direct difference between percentages. Percent change measures that difference relative to the starting value. Here is how to calculate and report both correctly.

A survey’s margin of error describes sampling uncertainty, not total accuracy. Here is how to evaluate the errors and design choices hidden behind the ± figure.

NPS compresses willingness-to-recommend ratings into one accessible number, but the score can conceal composition, sampling, uncertainty, and context differences.