Question

Researchers were interested in learning the effects of trans fats on levels of cholesterol in the blood. Two different research designs were constructed.

Part I: Between-Groups Design

In the between-groups design, researchers were interested in whether cholesterol levels would differ depending on diet. Twenty participants were randomly assigned to one of two different groups. Group A was assigned a diet rich in fruits and vegetables and with no trans fats. Group B participants were asked to follow their normal diets, which contained varying levels of trans fats depending on the individual. After one month, blood samples were drawn 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 the following questions:

• What is the independent variable in this study?
• What are the levels of that independent variable?
• What is the dependent variable?

Answer 1

Researchers were interested in learning the effects of trans fats on levels of cholesterol in the blood. Two different research designs were constructed.

Part I: Between-Groups Design In the between-groups design, researchers were interested in whether cholesterol levels would differ depending on diet. Twenty participants were randomly assigned to one of two different groups. Group A was assigned a diet rich in fruits and vegetables and with no trans fats. Group B participants were asked to follow their normal diets, which contained varying levels of trans fats depending on the individual. After one month, blood samples were drawn 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 .

In the between groups design, researchers were intrested in whether cholesterol levels would different depending on diet. Group B participants were asked to follow theri normal diets which contained varying levels of trans fats depending n the individual.

1. An independent variable is the variable that is changed or controlled in a scientific experiment.

Independent variables are the variables that the experimenter changes to test their dependent variable.

Here, The Diet influenced on Blood Cholesterol. So Indepdent variable is Diet.

2. There are two levels of Diet one is Healthy another one is Normal.

3. A dependent variable is the variable being tested in a scientific experiment.

The dependent variable is 'dependent' on the independent variable. As the experimenter changes the independent variable, the change in the dependent variable is observed and recorded.

Here Blood Cholesterol is influenced by Diet. So dependent variable is Blood Cholesterol

1. An independent variable is the variable that is changed or controlled in a scientific experiment.

Independent variables are the variables that the experimenter changes to test their dependent variable.

Here, The Diet influenced on Blood Cholesterol. So Indepdent variable is Diet.

2. There are two levels of Diet one is Healthy another one is Baseline.

3. A dependent variable is the variable being tested in a scientific experiment.

The dependent variable is 'dependent' on the independent variable. As the experimenter changes the independent variable, the change in the dependent variable is observed and recorded.

Here Blood Cholesterol is influenced by Diet. So dependent variable is Blood Cholesterol