Construct a 95% confidence interval for the population mean, mu. Assume the population has a normal distribution. A sample of 25 randomly English majors has a mean test score of 81.5 with a standard deviation of 10.2. A. (77.29, 85.71) B. (66.35, 69.89) C. (56.12, 78.34) D. (87.12, 98.32)
