Author Question: Suppose you were to read about a study showing that people who sleep less than five hours a night ... (Read 78 times)

Wadzanai · **on:** Jul 24, 2018

Suppose you were to read about a study showing that people who sleep less than five hours a night have twice as much risk of a premature death as people who sleep seven or eight hours a night.The baseline risk in this context is
a. the risk of premature death for people who sleep less than five hours a night.
b. the risk of premature death for people who sleep seven or eight hours a night.
c. the risk of premature death for all people.
d. the risk of premature death at the beginning of the study for those in the study.

Question 2

Suppose you were to read about a study showing that people who sleep less than five hours a night have twice as much risk of a premature death as people who sleep seven or eight hours a night.Can you conclude that sleeping the shorter hours causes a higher risk of premature death?
a. No, because the result was clearly based on an observational study.
b. Yes, because the result was clearly based on a randomized experiment.
c. The answer depends on whether the research was based on an observational study or a randomized experiment, and it isn't obvious which was used.
d. No, because the baseline risk of premature death is not given.