The median is the best measure of central tendency when: MCQ with Answer and Explanation

Explanation:
Using a base of 1,000 transforms small proportions (e.g., 0.02) into whole numbers (20), enhancing readability and comparability across populations without altering the underlying rate.

Explanation:
MMR is elevated where women lack access to skilled care during pregnancy and childbirth, leading to unmanaged complications like hemorrhage, sepsis, or obstructed labor.

Explanation:
Pre-testing a questionnaire with a small pilot group helps detect unclear wording, logical flaws, or response issues, ensuring the instrument is valid and reliable for the main survey.