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MN ore conditions

Consider each situation described below. Identify the population and the sample, explain what p and p represent, and tell whether the methods of this chapter can be used to create a confidence interval.

a) A large company with 10,000 employees at their main research site is considering moving its day care center offsite to save money. Human resources gathers employees' opinions by sending a questionnaire home with all employees; 380 surveys are returned, with 228 employees in favor of the change.

b) A company sold 1632 MP3 players last month, and within a week, 1388 of the customers had registered their products online at the company website. The company wants to estimate the percentage of all their customers who enroll their products.

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