Researchers are interested in the impact of a sleeping medication on quality of sleep. They have one group of participants take an actual sleeping medication prior to bed, while the other group takes a sugar pill. They ask participants to rate the quality of their sleep in the morning. Identify the independent and dependent variables in this proposed study.
◦ The dependent variable is the group that took the sleeping medication; the independent variable is the group that took the sugar pill.
◦ The dependent variable is quality of sleep; the independent variable is the type of pill that was taken.
◦ The dependent variable is the group that took the sugar pill; the independent variable is the group that took the sleeping medication.
◦ The dependent variable is the type of pill that was taken; the independent variable is the quality of sleep.
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