Can a conclusion that the exercise program caused more sleep?
a. A cause and effect relation might be concluded because the study had a control group.
b. A cause and effect relation might be concluded because the study was a randomized experiment.
c. A cause and effect relation cannot be concluded because the study was an observational study.
d. A cause and effect relation cannot be concluded because diet was not controlled.
Question 2
What is the explanatory variable in the study?
a. Amount of food eaten (calories) per day
b. Following an exercise program four times a week for 16 weeks (or not)
c. Amount of sleep per night
d. Age
Spinal changes caused by osteoporosis.
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