determine whether the study is an experiment ...
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. 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.
Answer
# Answer:
A. The sample is too small.
# Brief Explanation:
With only 4 males and 4 females, the sample size is insufficient for reliable results in studying blood - pressure differences. Small samples may not represent the population well and can lead to inaccurate conclusions.