Question

use practical example to distinguish between cross sectional survey and a longitudinal survey

Answer 1

A cross-sectional survey is defined as a type of observational survey that analyzes data from a population, or a representative subset, at a specific point in time.

For example: A survey in which researcher collects data on current smoking habits and current diagnoses of lung cancer of people living in New York at present moment is an example of cross-sectional suvey.

A longitudinal survey is defined as a type of survey that involves repeated observations of the same variables over short or long periods of time. It is often a type of observational study, although they can also be structured as longitudinal randomized experiments.

For example: Many medical surveys such as are surveys on cancer risks among smokers are longitudinal in nature because here a set of sample or same individuals form a group and observed and studied over the years.

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