You wish to describe the type of patients who use the anticoagulation monitoring services your department/hospital provides. Specifically, the Pharmacy and Therapeutics Committee (P&T) is interested in the age of the population served. Which one of the following pieces of information [about the type of patient, related to their age] will be most useful to the committee members? A) Standard error of the mean (SEM) B) t-test C) Mean D) Chi-square test