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Use the Following Information for Following Questions

Question 33

Multiple Choice

Use the following information for following questions:
A group of 500 patients who suffer from skin cancer were asked to participate in a study to
determine the effectiveness of a new medication. The patients were randomly divided into two
groups, one that was given the actual medication, and one that received a placebo pill. A good
outcome was defined as the cancer being in remission after 6 months of treatment. The results of
the study are below. Use the following information for following questions: A group of 500 patients who suffer from skin cancer were asked to participate in a study to determine the effectiveness of a new medication. The patients were randomly divided into two groups, one that was given the actual medication, and one that received a placebo pill. A good outcome was defined as the cancer being in remission after 6 months of treatment. The results of the study are below.   -Can we conclude that the cancer remissions were caused by the new medication? A) Yes, this is a controlled experiment.Since a higher percent of patients who took the medication had cancer remissions, we can conclude causation. B) Yes, this is a controlled experiment.We can always conclude causation with a controlled experiment. C) No, even though this is a controlled experiment, there was no difference between the treatment and control groups, so we cannot conclude causation. D) No, even though this is a controlled experiment, there might be a confounding factor since the placebo group had cancer remissions too.
-Can we conclude that the cancer remissions were caused by the new medication?


A) Yes, this is a controlled experiment.Since a higher percent of patients who took the medication had cancer remissions, we can conclude causation.
B) Yes, this is a controlled experiment.We can always conclude causation with a controlled experiment.
C) No, even though this is a controlled experiment, there was no difference between the treatment and control groups, so we cannot conclude causation.
D) No, even though this is a controlled experiment, there might be a confounding factor since the placebo group had cancer remissions too.

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