A researcher examined whether taking a 50 mg dose of aspirin before sleeping to
ID: 3301065 • Letter: A
Question
A researcher examined whether taking a 50 mg dose of aspirin before sleeping to decrease the risk of night time heart attacks differed from taking no asprin at all. The researcher also wanted to know if such asprin taking affected obese adults differently from adults with normal weight. Which of the following statements is true (covers materail from Morling Chp. 12 pages 353 - 359)?
There are no main effects. The interaction examined is whether night time heart attacks are affected by a person's weight.
There are only one main effect, and no interaction. The main effect is whether obese people have lower night time heart attacks when taking asprin.
The main effect is whether heart attack risk is greater for obese or normal weight adults. There is no other main effect. The interaction examined is the impact of aspirin on night time heart attack for only obese people.
One main effect is whether aspirin affects night time heart attacks differently from taking no aspirin. A second main effect is whether night time heart attacks is different for obese than normal weight adults. The interaction examined is whether the impact of aspirin on night time heart attacks is affected by a person's weight.
There are no main effects. The interaction examined is whether night time heart attacks are affected by a person's weight.
There are only one main effect, and no interaction. The main effect is whether obese people have lower night time heart attacks when taking asprin.
The main effect is whether heart attack risk is greater for obese or normal weight adults. There is no other main effect. The interaction examined is the impact of aspirin on night time heart attack for only obese people.
One main effect is whether aspirin affects night time heart attacks differently from taking no aspirin. A second main effect is whether night time heart attacks is different for obese than normal weight adults. The interaction examined is whether the impact of aspirin on night time heart attacks is affected by a person's weight.
Explanation / Answer
One main effect is whether aspirin affects night time heart attacks differently from taking no aspirin. A second main effect is whether night time heart attacks is different for obese than normal weight adults. The interaction examined is whether the impact of aspirin on night time heart attacks is affected by a person's weight.
Option D is correct.
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