A researcher randomly sampled 100 students at a university and asked them if they regularly take vitamins. He also asked them how many colds they had in the last six months. He then compared the number of colds experienced by those who take vitamins to the number of colds experienced by those who don't take vitamins. What type of study is this?
A) Observational study
B) Case control study
C) Matched pairs study
D) Randomized experiment

Question

Quizplus · Accepted Answer

This is an observational study because the researcher observes and records information about the subjects without attempting to influence or modify their behavior or attributes. In this case, the researcher is not intervening or manipulating the subjects' vitamin intake but rather observing the relationship between vitamin intake and the number of colds.

A Researcher Randomly Sampled 100 Students at a University and Asked