In a random sample of twelve cell phones, the mean full retail price was $434.00 and the standard deviation was $177.00. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 90% confidence interval for the population mean μ. Identify the margin of error. dollars (Round to one decimal place as needed.) Construct a 90% confidence interval for the population mean. (00 (Round to one decimal place as needed.) CES

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