Question

A confidence interval for a population mean has a margin of error of 3.2. a. Determine the length of the confidence interval. b. If the sample mean is 46.4, obtain the confidence interval. c. Construct a graph that illustrates your results. a. The length of the confidence interval is 6.4. (Type an integer or a decimal. Do not round.) b. The confidence interval for u is from 40 to 52.8 (Type integers or decimals. Do not round.) c. Choose the correct graph below. ОА. Confidence - Interval - EE O O OC. O O O O OG OD. Confidence - Interval EE O O G