Question

A researcher plans to investigate whether a cup of hot milk at night helps people relax so that they fall asleep quickly. in this study, _____________.
a. the independent variable is the amount of time it takes the person to fall asleep
b. the independent variable is the lab in which the research is conducted.
c. the independent variable is the hot milk at bedtime
d. the independent variable is the hypothesis of the study.

Answer 1

C. the independent variable is the hot milk at bedtime