Late in the campaign for the June 1997 federal election, the Angus Reid Group conducted an opinion poll of public preferences. The poll found the Liberals had the support of 42% of the 3208 voters surveyed. In the election, the Liberals won 38.4% of the popular vote (based on reports by Reuters Limited). Test whether the public support in the poll was greater than on election day. Use the 0.05 level of significance. Did Liberal support drop in between the Angus Reid poll and the election?
Test the given claim, and draw the appropriate graph. Use the traditional method or the P-value method of testing hypotheses (or your instructor may specify which method to use with assigned exercises). Assume that all samples have been randomly selected.