5-2 WileyPLUS: Module Five Homework Question 7 of 13 View Policies Current Attempt in Progress Beer and Mosquitoes < > -/2.7 E 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 and 345 after. Lefvre 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 group 1 be the people who drank beer and let group 2 be the people who drank water. :: # < :: > :: 2 Ho: VS Ha: fb1 eTextbook and Media Hint [2 Pi :: P2 T :: 21 :: P2 T (b) Compute the average number of mosquitoes per volunteer before consumption for each group. Round your answers to two decimal places. Beer group: i 2.64 Water group: i 0.44 Are the two sample means different? Yes Do you expect that this difference is just the result of random chance? Yes eTextbook and Media Hint (c) Compute the average number of mosquitoes per volunteer after consumption for each group. Round your answers to two decimal places. Beer group: i Water group: i Are the two sample means different? Do you expect that this difference is just the result of random chance? eTextbook and Media Hint (d) If the difference in part (c) provides convincing evidence for the alternative hypothesis, do we have evidence that beer consumption increases mosquito attraction? Yes O No eTextbook and Media Hint Save for Later Attempts: 0 of 3 used Submit Answer