Number of variables (predictive)

1. How many variables are there in the research
question?
Two Three of More

2. Many relationship questions deal with TWO VARIABLES:
For example: To what degree does:
• gender predict driving speed (TWO variables)
• age predict the amount of time spent on social media (TWO
variables)
• height predict weight (TWO variables)

3. In other cases, relationship questions deal with THREE OR MORE
VARIABLES:
For example: To what degree does:
• gender and age predict driving speed (THREE variables)
• faculty tenure, number of publications, and teaching ratings
predict faculty salary (FOUR variables)

4. Let’s Practice

5. Do glucose levels and amount of exercise
significantly predict diabetes diagnoses?
Two Three of More

6. Do glucose levels and amount of exercise
significantly predict diabetes diagnoses?
Two Three of More

7. Do glucose levels and amount of exercise
significantly predict diabetes diagnoses?
Two Three of More
1

8. Do glucose levels and amount of exercise
significantly predict diabetes diagnoses?
Two Three of More
1 2

9. Do glucose levels and amount of exercise
significantly predict diabetes diagnoses?
Two Three of More
1 2
3

10. Does amount of charitable acts in a span of a
month predict sense of wellbeing scores?
Two Three of More

11. Does amount of charitable acts in a span of a
month predict sense of wellbeing scores?
Two Three of More

12. Does amount of charitable acts in a span of a
month predict sense of wellbeing scores?
Two Three of More
1

13. Does amount of charitable acts in a span of a
month predict sense of wellbeing scores?
Two Three of More
1
2

14. How many variables are there in the original
research question?
Two Three of More