Question

Using a sample of 40 patients from a local hospital, researchers measured cholesterol level in an attempt to estimate the mean cholesterol level of U.S. citizens.

Is this study
A. REPRESENTATIVE?
B. NON-REPRESENTATIVE?

Answer 1

B. NON-REPRESENTATIVE

Explanation:

The sample does not represent the population as a researcher is taking a sample from the hospital where the cholesterol level of the patient is generally high and the researcher is not randomly selecting the U.S. citizens.

Thus, option (B) is correct.

Further, the sample is a subset of the population and it is easy to analyze as compared to the population.

The sample is said to be representative if it represents the whole population.