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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. According to BusinessWeek 41 % of advertisers claim they have been a victim of click fraud. Suppose a simple random sample of 300 advertisers will be taken to learn more about how they are affected by this practice. Use z-table.
a. What is the probability that the sample proportion will be within 0.05of the population proportion experiencing click fraud? (to 4 decimals)
b. What is the probability that the sample proportion will be greater than 0.49? (to 4 decimals)
A basketball team has sixteen women on the roster. In how many ways can the coach choose a roster consisting of five different positions?
A study is conducted in order to determine the relationship between estrogen therapy and heart attack. Compute the cumulative incidence of heart attack in women who do take estrogen? Round to three decimal places
Does the sample suggest that trees in the Hopkins Forest are more susceptible than trees from the rest of the region?
Refer to Thought Question at the beginning of this chapter. The headline was based on a study in which a representative sample of over 400,000 adults.
recent recommendations suggest 60 minutes of physical activity per day. a sample of 50 adults in a study of
1) On an exam there are 10 multiple choice questions. Each multiple choice question has four alternatives to choose from, of which only one is correct. A student can either be prepared or unprepared for the exam. Let us assume that it is equally like..
the average daily high temperature in february in fort collins is 47 degrees weatherchannel.com. assume that the daily
Provide a definition of statistics and explain the importance of statistics in today's business.
What is the minimum percentage a student needs to earn a grade of A?
Among the women, 6 have red/green color blindness. Test the claim that men have a higher rate of red/green color blindness.
a university dean wishes to estimate the average number of hours that freshmen study each week. the standard deviation
If the test is positive, what is the probability that this person actually has heart disease?
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