Vaccines, big surveys, and paradoxes

In statistics, data quality matters more than data quantity.

Surveys act as a dusty mirror on society. These tools are crucial to understanding attitudes, opinions, and reported behaviours in populations.

Surveys provide estimates, differing from true values for many potential reasons. One such reason is sampling error: the difference due to picking random members to survey. That random selection may not reflect the population, even within specific groups. There are other reasons, inducing systematic…