Influencing Voters When getting voters to support a candidate in an election, is there a difference between a recorded phone call from the candidate or a flyer about the candidate sent through the mail? A sample of 500 voters is randomly divided into two groups of 250 each, with one group getting the phone call and one group getting the flyer. The voters are then contacted to see if they plan to vote for the candidate in question. We wish to see if there is evidence that the proportions of support are different between the two methods of campaigning. Will vote for Candidate Will not vote for Sample A Candidate Phone Call 150 100 Flyer 132 118 Table 1: Sample A: Is a phone call or a flyer more effective? Sample B Will vote for Candidate Will not vote for Candidate Phone Call 180 70 Flyer 125 125 Table 2: Sample B: Is a phone call or a flyer more effective?(a) State the null and alternative hypotheses. Let group 1 be the supporters of Candidate A after a phone call and let group 2 be the supporters of Candidate A after a flyer. p :: 1 p P1 : P2 p : P1 : p2 vs Ha: Ho: 1 eTextbook and Media Hint(b) Possible sample results are shown in Table 1. Compute the two sample proportions: 131, the proportion of voters getting the phone call who say they will vote for the candidate, and p2 , the proportion of voters getting the yer who say they will vote for the candidate. Enter the exact answers. Is there a difference in the sample proportions? 4b eTextbook and Media Hint (c) A different set of possible sample results are shown in Table 2. Compute the same two sample proportions for this table. Enter the exact answers. v1 = l m = n eTextbook and Media Hint (d) Which of the two samples seems to offer stronger evidence of a difference in effectiveness between the two campaign methods? A Sample A A Sample B eTextbook and Media Hint