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5 Suppose that a market research firm is hired to estimate the percent of adults...

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5 Suppose that a market research firm is hired to estimate the percent of adults living in a large city who have cell phones Five hundred randomly selected adult residents in this city are surveyed to determine whether they have cell phones Of the 500 people surveyed 421 responded yes they own cell phones Using a 95 confidence level compute a confidence interval estimate for the true proportion of adult residents of this city who have cell phones Bound all calculated values to two decimal places and show all five steps of building a confidence interval

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