Beer and Mosquitos

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. In the experiment 25 volunteers consumed a liter of beer while 18 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 was 434 and the total was 590 after consumption. For the water group the total was 337 before 345 after.

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

Let group 1 be the people who drank beer and let group 2 be the people who drank water

(B) Compute the average numbers of mosquitoes per volunteer before consumption for each group

Round your answer to two decimal places

Beer Group

Water group

(C) Compute the average number of mosquitoes per volume after consumption for each group

Round your answers to two decimal place

Beer Group

Water Group

Are the two samples means different?

Do you expect that this difference is just the results of random chance?

(d) If the difference in part (c) provides convincing evidence for the alternative hypothesis do we have evidence that consumption increases mosquito attraction?

Yes

No