An investigator enrolls men who were college athletes and are now 40-59 years old into a study to examine the effectiveness in vitamins intended to decrease muscle loss. The men will be divided into three groups – Group 1 will take Vitamin A, Group 2 will take Vitamin B, and Group 3 will not take any vitamins. What is the independent variable?

The results section of an article where an ANOVA was used to compare groups, reported F(3,36) = 8.62, p

a. Provide your own example of a nondirectional research hypothesis (not an example from the lecture or readings). b. What is the corresponding null hypothesis for your example in part a? c. What is the independent variable in your example in part a?  d. What is the dependent variable in your example in part a?

Which of the following research questions would BEST be studied with a qualitative study?

What is the median for the following set of numbers?  12, 12, 14, 15, 16

Mirbagher-Ajorpaz and colleagues (2011) hypothesized that an acupressure intervention would decrease dysmenorrheal among female medical science students. What type of hypothesis is this?

An investigator is studying whether nurses who take a review course have a higher rate of passing the NCLEX than nurses who do not take the additional review course.  What is the research hypothesis?

A researcher is comparing the mean peak expiratory flow rate of a sample of 100 subjects with asthma before and after a walk outside on a cold rainy day. What test would be most appropriate?

 Reasons that a researcher may choose to conduct a post-test only study instead of a pretest-posttest study include:

An investigator is studying the difference in women’s readiness to be discharged from the hospital between women who had a vaginal birth and those who had a cesarean section. She sets her level of significance at 0.05. Her calculated p value is 0.27. What conclusion would she make?