Question

A researcher would like to examine if there are ethnic differences in level of daily stress. He intends to compare an average level of daily stress reported by a samples of 20 Caucasian, 20 African-American and 20 Hispanic participants This study is an example of _____________.

• A. an experiment

• B. a quasi-experiment (i.e., non-equivalent groups)

• C. a correlational study

Answer 1

A researcher would like to examine if there are ethnic differences in level of daily stress. He intends to compare an average level of daily stress reported by samples of 20 Caucasian, 20 African-American and 20 Hispanic participants. This study is an example of

B. a quasi-experiment (i.e., non-equivalent groups)

Explanation:

For the given scenario, the samples selected for the given study are not random samples. Participants are not randomly assigned to given four groups. There is no any control group for this study design. So, this is a quasi-experiment.

For an experiment, we randomly assign the groups to participants and there is a presence of control group for the experimental study. For a correlation study, we need two quantitative variables. We want to check whether there are ethnic differences in level of daily stress.