A confidence interval for a population mean has a margin of error of 2.2. a. Determine the length of the confidence interval. b. If the sample mean is 54.4, obtain the confidence interval. c. Construct a graph that illustrates your results. a. The length of the confidence interval is (Type an integer or a decimal. Do not round.) b. The confidence interval for μ is from to (Type integers or decimals. Do not round.) c. Choose the correct graph below. O A. O C. 51 51 Confidence Interval- 58 58 B. D. 50 50 E Confidence Interval E E

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