A researcher plans to conduct an experiment to test whether a cup of hot milk at
ID: 72944 • Letter: A
Question
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:
the amount of time it takes participants to fall asleep.
the consumption of hot milk at bedtime.
the number of participants drinking hot milk at bedtime.
the number of hours each participant sleeps for.
the amount of time it takes participants to fall asleep.
the consumption of hot milk at bedtime.
the number of participants drinking hot milk at bedtime.
the number of hours each participant sleeps for.
Explanation / Answer
the consumption of hot milk at bedtime.
The independent variables represent inputs or causes, i.e. potential reasons for variation. An independent variable is the variable you have control over, what you can choose and manipulate. It is usually what you think will affect the dependent variable. In some cases, you may not be able to manipulate the independent variable. It may be something that is already there and is fixed, something you would like to evaluate with respect to how it affects something else, the dependent variable like color, kind, time.
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