What you’ll learn to do: Interpret the conclusion of a hypothesis test for matched or paired data

To see if an old mosquito repellant was better than a new mosquito repellant, volunteers received the old repellant on one arm and the new repellant on the other. Which arm received which version of the repellant was randomized. After putting both arms in separate bins with mosquitos, the number of bites was counted on each arm and a difference in the number of bites was formed. This type of experimental design is known as matched or paired samples. You will learn more about how to do a hypothesis test for matched or paired samples in this section.