Does consuming beer attract mosquitoes? A study done in Burkino Faso, Africa, about the spread of malaria investigated the connection between beer consumption and mosquito attraction.¹In the experiment,25

volunteers consumed a liter of beer while18

volunteers consumed a liter of water. The volunteers were assigned to the two groups randomly. The attractiveness to mosquitoes of each volunteer was tested twice: before the beer or water and after. Mosquitoes were released and caught in traps as they approached the volunteers. For the beer group, the total number of mosquitoes caught in the traps before consumption was434

and the total was590

after consumption. For the water group, the total was337

before and345

after.

¹Lefvre T., et al. "Beer Consumption Increases Human Attractiveness to Malaria Mosquitoes," 2010; 5(3): e9546.

(a) Define the relevant parameter(s) and state the null and alternative hypotheses for a test to see if, after consumption, the average number of mosquitoes is higher for people who drink beer.

Let group1

be the people who drank beer and let group2

be the people who drank water.