The Ages of a Group of Patients Being Treated at One

Multiple Choice

The ages of a group of patients being treated at one hospital for osteoporosis are summarized in the frequency histogram below. Based on the histogram, is a large sample necessary to conduct a hypothesis test about the mean age? If so, why?

A) No; data appear to be normally distributed with no outliers.
B) Yes; data do not appear to be normally distributed but skewed left.
C) Yes; data do not appear to be normally distributed but bimodal.
D) Yes; data do not appear to be normally distributed but skewed right.