Advertisers contract with Internet service providers and search engines to place ads onwebsites. They pay a fee based on the number of potential customers who click on theirad. Unfortunately, click fraud—the practice of someone clicking on an ad solely for thepurpose of driving up advertising revenue—has become a problem. Forty percent ofadvertisers claim they have been a victim of click fraud (Businessweek, March 13, 2006).Suppose a simple random sample of 380 advertisers will be taken to learn more about howthey are affected by this practice.a. What is the probability that the sample proportion will be within ±.04 of the population proportion experiencing click fraud?
Advertisers contract with Internet service providers and search engines to place ads on
websites. They pay a fee based on the number of potential customers who click on their
ad. Unfortunately, click fraud—the practice of someone clicking on an ad solely for the
purpose of driving up advertising revenue—has become a problem. Forty percent of
advertisers claim they have been a victim of click fraud (Businessweek, March 13, 2006).
Suppose a simple random sample of 380 advertisers will be taken to learn more about how
they are affected by this practice.
a. What is the probability that the sample proportion will be within ±.04 of the population proportion experiencing click fraud?
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