An article entitled \"Too Few Z\'s May Result in Too Many Pounds\" tells about t

Question

An article entitled "Too Few Z's May Result in Too Many Pounds" tells about two studies blished in 2004 in the Annals of Internal Medicine, which show that "loss of sleep boosts levels of a hormone that tells us we're hungry, while dropping levels of a hormone that signals the body that we're full. Researchers have noticed that increased obesity among Americans has coincided with less time spent asleep. In 1960, U.S. adults slept an average of more than 8 hours a night; by. 2002, the average had fallen to less than

Explanation / Answer

a) Negative. As amount of sleep decreases, the levels of a hormone that tells us we're hungry increases.

b) Positive. As amount of sleep decreases, the levels of a hormone that tells us we're full decreases.

c) Last two sentences of the previous quotes show that as amount of sleep decreases, weight increases. Since sleep is measured as "amount of sleep in hours), it can be treated as quantitative variable.

d) Since weight is can also be treated as quantitative variable.

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