Statistics Solutions

[Solution] An automobile dealership plans to conduct a survey to determine what proportion of new-car buyers continue to have their cars services at the

Question: An automobile dealership plans to conduct a survey to determine what proportion of new-car buyers continue to have their cars services at the dealership after the warranty period ends. It estimates that 30 percent of customers do so. It wants the results of its survey to be accurate within 5 percent, and it want sot be 95 percent confident of the results. What sample size in necessary. Explain.

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