Q3

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 link. An analysis of 1,100 clicks coming into a company's site during a week identified 180 of these clicks as fraudulent. Complete parts (a) through (c) below. (a) Under what conditions does it make sense to treat these 1,100 clicks as a sample? What would be the population? Identify the necessary conditions. Select all that apply. A. The clicks must be selected at random. 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 below. A. All clicks on ads placed in search results B. All clicks into this company's site C. All companies that advertise on the Internet D. All fraudulent clicks (b) 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 % to %]. (Round to one decimal place as needed.) (c) If a company pays the operators of a search engine $4.75 for each click, give a 95% confidence interval for the mean cost per click due to fraud. 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 link. An analysis of 1,100 clicks coming into a company's site during a week identified 180 of these clicks as fraudulent. Complete parts (a) through (c) below. Idenuly une necessary condumers. select all ulat apply. A. The clicks must be selected at random. 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 below. A. All clicks on ads placed in search results B. All clicks into this company's site C. All companies that advertise on the Internet D. All fraudulent clicks (b) 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 % to %]. (Round to one decimal place as needed.) (c) If a company pays the operators of a search engine $4.75 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.) 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 link. An analysis of 1,100 clicks coming into a company's site during a week identified 180 of these clicks as fraudulent. Complete parts (a) through (c) below. (a) Under what conditions does it make sense to treat these 1,100 clicks as a sample? What would be the population? Identify the necessary conditions. Select all that apply. A. The clicks must be selected at random. 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 below. A. All clicks on ads placed in search results B. All clicks into this company's site C. All companies that advertise on the Internet D. All fraudulent clicks (b) 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 % to %]. (Round to one decimal place as needed.) (c) If a company pays the operators of a search engine $4.75 for each click, give a 95% confidence interval for the mean cost per click due to fraud. 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 link. An analysis of 1,100 clicks coming into a company's site during a week identified 180 of these clicks as fraudulent. Complete parts (a) through (c) below. Idenuly une necessary condumers. select all ulat apply. A. The clicks must be selected at random. 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 below. A. All clicks on ads placed in search results B. All clicks into this company's site C. All companies that advertise on the Internet D. All fraudulent clicks (b) 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 % to %]. (Round to one decimal place as needed.) (c) If a company pays the operators of a search engine $4.75 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.)