Researchers were interested in learning the effects of transfats on levels of cholesterol in the blood. Two different researchdesigns were constructed.
Part I: Between-Groups Design
In the between-groups design, researchers were interested inwhether cholesterol levels would differ depending on diet. Twentyparticipants were randomly assigned to one of two different groups.Group A was assigned a diet rich in fruits and vegetables and withno trans fats. Group B participants were asked to follow theirnormal diets, which contained varying levels of trans fatsdepending on the individual. After one month, blood samples weredrawn and the following levels of cholesterol were obtained:
Participant | Blood Cholesterol | Diet |
1 | 129 | Healthy |
2 | 98 | Healthy |
3 | 150 | Healthy |
4 | 75 | Healthy |
5 | 135 | Healthy |
6 | 175 | Healthy |
7 | 115 | Healthy |
8 | 103 | Healthy |
9 | 156 | Healthy |
10 | 143 | Healthy |
11 | 239 | Normal |
12 | 500 | Normal |
13 | 350 | Normal |
14 | 468 | Normal |
15 | 198 | Normal |
16 | 213 | Normal |
17 | 225 | Normal |
18 | 175 | Normal |
19 | 560 | Normal |
20 | 289 | Normal |
In 2 to 3 sentences in a Microsoft Word document, answer thefollowing questions:
- What is the independent variable in this study?
- What are the levels of that independent variable?
- What is the dependent variable?
