A Researcher Discovers Two Drugs That Lower Anxiety in Agitated

Multiple Choice

A researcher discovers two drugs that lower anxiety in agitated patients.However,one drug consistently lowers anxiety by moderate amounts,whereas the second sometimes lowers it by large amounts,sometimes has no effect,or may even increase anxiety in some patients.Although there is not an overall difference in the average (mean) amount of anxiety reduction,an important difference does exist between the two drugs.This difference would best be shown by using

A) measures of central tendency.
B) measures of variability.
C) frequency distributions and correlations.
D) graphical statistics.