Q. A researcher is interested in the effects of two new drugs, Drug A and Drug B, on learning. She has a group of 5 people take Drug A and then work on a learning task. One month later, the same 5 people take Drug B and then work on the same learning task as before. The number of errors made on the learning task after taking each drug is recorded below. Using an alpha of
.01, test for a difference between the groups.
1. Which type of test will you use? Support your answer.
2. State the null (H0) and alternative (H1) hypotheses using the correct symbols.
3. Is this a one-tailed or two tailed test? Why?
Q. A researcher is interested in the effects of two new drugs, Drug A and Drug B, on learning. She has a group of 5 people take Drug A and then work on a learning task. One month later, the same 5 people take Drug B and then work on the same learning task as before. The number of errors made on the learning task after taking each drug is recorded below. Using an alpha of
.01, test for a difference between the groups
4. What are the df associated with this test?
5. What is/are the critical value(s) one should use to test the researcher’s hypothesis at the .01 level?
6. Calculate the t-observed. Be sure to show all of your work.
7. State the decision regarding H0 – reject Ho or fail to reject Ho. Interpret the results
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