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In a random sample of eight cellphones, the mean full retail price was $505.50 and the standard deviation was $164.00. Assume the population is normally

In a random sample of eight cellphones, the mean full retail price was $505.50 and the standard deviation was $164.00. Assume the population is normally distributed and use thet-distribution to find the margin of error and construct a 90% confidence interval for the population mean . Interpret the results.

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