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 similar to Fig. 8.6 on page 320.

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