The subjects of a study by Dugoff et al. (A-5) were 10 obstetrics and gynecology interns at the University of Colorado Health Sciences Center. The researchers wanted to assess competence in performing clinical breast examinations. One of the baseline measurements was the number of such examinations performed. The following data give the number of breast examinations performed for this sample of 10 interns.

Intern Number No. of Breast Exams Performed 1 30 2 40 3 8 4 20 5 26 6 35 7 35 8 20 9 25 10 20