Question

determine whether the study is an experiment or an observational study, and then identify a major problem with the study. a medical researcher tested for a difference in systolic blood - pressure levels between male and female students who are 12 years of age. she randomly selected four males and four females for her study. this is an observational study because the researcher does not attempt to modify the individuals. what is a major problem with the study? a. the sample is too small. b. there is no blinding, which has a high chance of leading to bias. c. this is a convenience sample with voluntary response, which has a high chance of leading to bias. d. the sample includes male and female students.

Explanation:

The sample size is only four males and four females, which is too small to draw reliable conclusions. Small - sample studies may not accurately represent the population, leading to inaccurate results.

Answer:

A. The sample is too small