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In a random sample of eight cell phones, the mean full retail price was $418.00 and the standard deviation was $215.00. Assume the population is

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In a random sample of eight cell phones, the mean full retail price was $418.00 and the standard deviation was $215.00. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 99% confidence interval for the population mean . Interpret the results. Identify the margin of error. (Round to one decimal place as needed.)

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