Advertisers contract with Internet service providers and searchengines to place ads on websites. They pay a fee based on thenumber of potential customers who click on their ad. Unfortunately,click fraud—the practice of someone clicking on an ad solely forthe purpose of driving up advertising revenue—has become a problem.According to BusinessWeek 43% of advertisers claim theyhave been a victim of click fraud. Suppose a simple random sampleof 300 advertisers will be taken to learn more about how they areaffected by this practice. Use z-table.
a. What is the probability that the sampleproportion will be within +- 0.03 of the population proportionexperiencing click fraud?
(to 4 decimals)
b. What is the probability that the sampleproportion will be greater than 0.49?
(to 4 decimals)
