The researcher has reported a one-tailed analysis of variance to test the hypothesis, Nurse intervention plus group sessions is more effective than nurse intervention alone or community intervention in improving Framingham coronary risk scores among rural dwelling women in the Promoting Heart Health in Rural Women study. Why is the choice of a one-tailed test versus a two-tailed test appropriate?
1. It is easier to reject the null hypothesis using a two-tailed test.
2. There is only one true variable in this study.
3. The researcher has stated a directional research hypothesis.
4. The nurse wishes to develop a theoretical framework for further study.
Question 2
The nurse manager of a hospital unit has read a research study and recommends that the nurses on the unit change a standard intervention based upon the results of the study. Later, the nurse manager discovers a second research study that indicates the original study contained a type I error. What is the significance of this finding?
1. The change instituted by the nurse manager was unnecessary.
2. The change instituted by the nurse manager was not cost effective.
3. The change instituted by the nurse manager was dangerous.
4. The change instituted by the nurse manager was a good decision.
A killer whale plays with a ball of ice, soon after a researcher had thrown a snowball at the whale.
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