In the study described above, what do you think was Crystal's hypothesis?
a) Women would outperform men on the exam.
b) Sleep deprivation would affect performance on the exam.
c) A week is not enough time to study for an exam on a novel area.
d) Men would outperform women on the exam.
e) Sleep deprivation would lead to inferior performance on the exam when compared to a well rested group.
Question 2
Crystal is studying the effects of sleep deprivation on exam performance. In her experiment, she randomly assigned fifty men and fifty women into two different groups.
The first group could sleep eight hours a night for one week and the second group could sleep for only four hours a night for one week. All participants were given a book to study from at the start of the experiment and told they would be tested on the material at the end of the week. The group that had slept eight hours a night scored significantly higher on the exam than the group that had slept four hours a night. What was the independent variable for this study?
a) sex of participant
b) hours of sleep
c) the exam
d) the topic of the exam
e) random assignment
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