In a recent study, patients treated with a genetically engineered heart drug were able to walk on a treadmill for 26 seconds longer than those not receiving the drug and showed no side effects. Can we conclude that this drug is an effective treatment for heart disease?
a) yes
b) no. it is not clear that the proper controls were made
c) no. it is not clear that the drug is not a placebo
d) no. it is not clear how many subjects were in the study
e) no. genetically engineered drugs cannot be tested via the scientific method. they require comparative observations
Ans: b) no. it is not clear that the proper controls were made
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