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In a random sample of four microwave ovens, the mean repair cost was $70.00 and the standard deviation was $11.00. Assume the variable is normally distributed use a t distribution to construct a 99% confidence interval for the population of the mean u. what is the margin of error for u?

A. The 99% confidence interval for the population mean \mu is ....?

B. The margin of error is.....?

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