Confidence interval for the true proportion
In a random sample of 200 people 60 were found to participate. A two-sided 95% confidence interval for the true proportion of employees who participate is:
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Although studies continue to show smoking leads to significant health problems, 20% of adults in the United States smoke. Consider a group of 250 adults. What is the expected number of adults who smoke?
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At a classic car auction, you are interested in a 1940 Ford Standard Tudor and decide to bid for the car. There is a $25,000 reserve for this car, which means highest bid in excess of $25,000 will win. Competitors' bids follow a uniform distributi
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The image of the public library is constantly changing, and their online services continue to grow. Usage of the library's home page grew by 17% during the past 12 months. It has been estimated that the current average length of a visit to the lib
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