# SDSU The Influence of Gender & Stage of Life on Social Media Use Analysis

Activity #8 (Chapter 12 Factorial Design)

Design a 2 x 4 study

1. Give the study a title (1 pt)
2. What is your hypothesis? (2 pts)
3. Describe your independent variables (what are they are and what are their levels/groups) (2 pts)
4. How many total groups do you have and what are they? (2 pts)
5. What is your dependent variable? (1 pt)
6. Provide an example of a main effect and an example of an interaction (2 pts)

Example of a 2 x 3 (I canâ€™t make it too easy and give you a 2 x 4 example!).

Do not use the same independent or dependent variables that are in this example

1. The Effects of Diet and Exercise on Weight Loss

Be sure to list the â€œ2â€ variable first (diet) and the â€œ3â€ variable second (exercise)

1. It is hypothesized that those who are on a 1000 calorie diet and exercise 4 hours a day for a month will lose more weight than those who are not on a diet and exercise either 1 hour or 2 hours a day
2. First independent variable = diet (2 levels: Group 1= no diet; Group 2= 1000 calories a day for 1 month)

Second independent variable = exercise (3 levels: Group 1= exercise 1 hr per day for a month; Group 2 = exercise 2 hrs per day for a month; Group 3 = exercise 4 hrs a day for a month)

1. 6 total groups

1. No diet/exercise 1 hr a day for 1 month

2. No diet/exercise 2 hrs a day for 1 month

3. No diet/exercise 4 hrs a day for 1 month

4. 1000 cal a day for a month/exercise 1 hr a day for 1 month

5. 1000 cal a day for a month/exercise 2 hrs a day for 1 month

6. 1000 cal a day for a month/exercise 4 hrs a day for 1 month

1. Weight loss after 1 month
2. Main effect: Those on a diet lost more weight than those not on a diet

Interaction: Subjects who were on a 1000 calorie a day diet and exercised 4 hours a day lost the most weight

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