Question
95% confidence interval (PART C)

When a company advertises on the Internet, the company pays the operators of search engines each time an ad for the company appears with search results and someone clicks on the link. Click fraud is when a computer program pretending to be a customer clicks on the ink. An analysis of 1,100 clicks coming into a companys site during a week identified 155 of these clicks as fraudulent. Complete parts (a) through (c) below B. The week must be randomly selected. C. The company must be representative of all companies that advertise on the Internet D. The week must be representative of a typical week. Identify the population belovw OA. All companies that advertise on the Internet B. All clicks on ads placed in search results OC. All fraudulent clicks D. All clicks into this companys site (D) Show the 95% confidence interval for the population proportion of fraudulent clicks in a form suitable for sharing with a nontechnical audience. The 95% confidence interval for the population proportion is [ 12 % to 161 %] (Round to one decimal place as needed.) (c) If a company pays the operators of a search engine $4.25 for each click give a 95% confidence interval for the mean cost per click due to fraud The 95% confidence interval for the mean cost is to Round to the nearest cent as needed.)
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