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In a random sample of twelve cell phones, the mean full retail price was $454.50 and the standard deviation was $156.00. Assume the population is

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In a random sample of twelve cell phones, the mean full retail price was $454.50 and the standard deviation was $156.00. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 95% confidence interval for the population mean u. Interpret the results

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