A company is trying to decide whether to provide an outdoor gazebo for the smokers on its staff. Before any money is spent on construction costs, the company would like to estimate the percentage of its workers who smoke. A random sample of 300 employees reveals 56 smokers. Construct a 99% confidence interval for the proportion of smokers in this company.
Answer to relevant QuestionsA human resources consulting firm wants to estimate the average salary of university graduates with a bachelor's degree in science, and 10 years of working experience, in the Toronto area. A sample of 50 such employees ...How large a sample should be taken to estimate the percentage of Canadian Internet users who visit social networking sites, to within 4%, with 96% confidence? A random sample of 1,202 British Columbia residents was given a list of several approaches for retailers to deal with plastic bags. Of those surveyed, 469 said that retailers should provide biodegradable plastic bags to ...A college is concerned that the scarcity of housing in the immediate area has made it difficult for students to find affordable accommodation. It is claimed that the average monthly rent paid by a student at the college is ...The confidence interval created in Exercise 20 is quite wide. How large a sample would be necessary if the company wanted to estimate the percentage of its accounts receivable that were 0 to 30 days old to within 5%, with ...
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