A Researcher Plans to Conduct an Experiment to Test Whether

question 177

Multiple Choice

A researcher plans to conduct an experiment to test whether a cup of hot milk at night helps people fall asleep faster than usual. In this study, the independent variable is:

• A) the amount of time it takes participants to fall asleep.
• B) the consumption of hot milk at bedtime.
• C) the number of participants drinking hot milk at bedtime.
• D) the number of hours for which each participant sleeps.