Question: A confidence interval for a population mean has length 22. a) Determine the margin of error. b) If the sample mean is 55.8, obtain the

 A confidence interval for a population mean has length 22. a)

A confidence interval for a population mean has length 22. a) Determine the margin of error. b) If the sample mean is 55.8, obtain the confidence interval. Confidence interval: (

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