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Abdul is researching a new drug to enhance memory. He hypothesizes this new drug will reduce the number of errors a rat makes while navigating a maze. He gives the drug to the experimental group and gives the control group a placebo. He then records the number of errors each rat makes while going through a maze.

In order to confirm or reject his hypothesis, Abdul needs to use which of the following?

A

A scatter plot to show the relationship between the drug and the number of errors made by each rat.

B

Descriptive statistics to show the mean between the experimental and control groups.

C

Histograms to demonstrate the differences in the number of errors committed by each group.

D

A correlation coefficient to show the strength and the direction of the relationship between the use of the drug and memory of the rats.

E

Inferential statistics to draw conclusions about the sample and the population.

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