Question: (1 pt) A confidence interval for a population mean has a margin of error of 4. a) Determine the length of the confidence interval. b)

(1 pt) A confidence interval for a population mean has a margin of error of 4.

a) Determine the length of the confidence interval.

b) If the sample mean is 55.5, obtain the confidence interval. Confidence interval: (_______, _______).

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