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 ▼ because the researcher ▼ does not attempt to modify applies a treatment to the individuals. what is a major problem with the study? a. there is no blinding, which has a high chance of leading to bias. b. the sample includes male and female students. c. this is a convenience sample with voluntary response, which has a high chance of leading to bias. d. the sample is too small.

Observational study/The sample is too small

Explanation:

The study is observational since there is no attempt to modify nor apply any kind of treatment.

An important problem in this study is the quantity of the sample. It is explained that the research selected only 8 individuals, which is not a significant sample. The minimum number of samples should be at least 30.

d.

thist title points out that you are explaining the nature of the u.s. government. it is the most specific. a representative government consists of a government where decisions are taken according to a voting system. the most essential aspect of a representative government is found in the different structures where voting rights are granted to different groups of people. for example, voting for governor, mayor, president, local police chief etc.