Ada's Professor Tells Her Class That the Average Score on the Last

Multiple Choice

Ada's professor tells her class that the average score on the last test was 72 points.Ada wants to know if most students actually scored near 72,or if the grades were more spread out,with many students doing much better or worse than a 72.What statistic could Ada ask her professor to calculate to help answer her question?

A) standard deviation
B) median
C) mode
D) correlation coefficient