Question

4 A researcher examines whether taking Vitamin D supplements (0x a day, 1x a day) influences self-reported depression (measured as either “depressed” or “not depressed”).

A. What is the independent variable?
B. What type or category of independent variable is used?
C. What is the dependent variable?
D. How many levels are there for the independent variable?
E. What is the scale of measurement for the dependent variable?

Answer 1

A. The independent variable is the frequency of taking Vitamin D supplements (0x a day or 1x a day).

B. The independent variable is categorical.

C. The dependent variable is self-reported depression (measured as either “depressed” or “not depressed”).

D. There are two levels for the independent variable: 0x a day and 1x a day.

E. The scale of measurement for the dependent variable is nominal.