Drug A is the usual treatment for depression in graduate students. Pfizer has a
ID: 3063409 • Letter: D
Question
Drug A is the usual treatment for depression in graduate students. Pfizer has a new drug, Drug B, that it thinks may be more effective. You have been hired to design the test program. As part of your project briefing, you decide to explain the logic of statistical testing to the people who are going to be working for you.
Write the research hypothesis and the null hypothesis. (2 pts)
Then construct a table like the one below, displaying the outcomes that would constitute Type I and Type II error. (2 pts)
Explanation / Answer
The null hypothesis would be
H0: Both Drug A and Drug B are equally effective or we can say Drug B isn't more effective than Drug A.
And the alternative hypothesis would be
H1: Drug B is more effective than Drug A.
The true state of the world
NO ERROR
Type l error: We decided that Drug B is more effective than Drug A but it was not in real world.
H0 is true: Drug B is not more effective than Drug A
H1 is true: Drug B is more effective than Drug A
CONSEQUENCES OF ERROR
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NO ERROR
Type II error: We decided that Drug B is not more effective than Drug A but it was.Type l error: We decided that Drug B is more effective than Drug A but it was not in real world.
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