Dr. Crawford is testing memory in lab rats. He hypothesizes that a new drug will improve a rat’s memories while navigating through a complex maze. Dr. Crawford gives the new drug to the experimental group and gives the control group a placebo. He then records the time it takes each rat to navigate the maze. To know whether his hypothesis has been supported, it is imperative that Dr. Crawford uses which of the following?

normal curve

descriptive statistics

bar graph

inferential statistics

scatter plot