A clinic in Denver, CO treats 125 patients annually for pain. Of those, 48 present with fibromyalgia. The national average presenting with fibromyalgia in pain clinics is 60%. Investigators wish to know whether they have significantly fewer proportions of fibromyalgia patients in the North Carolina clinic compared to the national average.

A) What is the null hypothesis? What is the research hypothesis?

B) What is the appropriate test statistic? What is the critical value for the test statistic?

C) What is the test statistic for this study?

D) Interpret the findings.