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
Continued harvest of (a) cod and (b) mountain sheep by humans has caused evolutionary changes in mat
Serotonin and the Sleep–Waking Cycle
Many teens are chronically sleep-deprived, leading to daytime sleepiness.
Is the principle of cause and effect unfounded?
Severe hash is almost always caused by cylinder misfire conditions.
Position effect, as illustrated in the eye phenotype in two female Drosophila