Question: A confidence interval for a population mean has a length of 162.6. a. Determine the margin of error. b. If the sample mean is 643.1,

A confidence interval for a population mean has a length of 162.6.

a. Determine the margin of error.

b. If the sample mean is 643.1, determine the confidence interval.

c. Construct a graph that illustrates your results.

In each of Exercises 8.53–8.60, answer true or false to each statement concerning a confidence interval for a population mean. Give reasons for your answers.

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