Question 10.

In a QI project in a health care setting, the DNP is trying to demonstrate that a new evidence based guideline leads to better patients outcomes than the currently used protocol. Using null hypothesis testing she needs to demonstrate that there is a low probability that the apparent superiority of the new guideline would occur randomly- therefore the new guideline must be superior to the old practice. Which of the following p values would support such a conclusion.?

A. p=0001, indicating that this difference between the new and the old treatment would occur randomly in only 1 in 10,000 QI projects.

B. p> .05, indicating that this difference between the new and the old treatment would probably happen in more than 5 out of 100 QI project.

C. p< .01 indicating that this difference between the new and the old treatment would occur consistently in 10 of 10,000 QI project.

Question 11

1 .In a study of weight loss among diabetics patients, patients in the exercise interventions group showed a mean 7% weight loss. The difference between two groups means is 3 and the 95%CI is -1 to 7, which of the following is the most accurate prediction of patient outcomes, if you try to replicate this study in your practice ?

a. Because the CI contains-1, the diet group might loose more weight on average than the exercise group in your practice

b. Because the CI contains 3, you might get the same results in your practice

c. All of the above are accurate predictions