Answer (Choose 1 answer)
A random sample of 40 students has a mean annual earnings of 3120. Assume the population standard deviation is 677. Construct the confidence interval for the population mean. Use a 95% confidence level.
A. (4812, 5342)
B. None of the other choices is correct
C. (2910, 3330)
D. (210, 110)
E. (1987, 2346)
Let 20.051.645, 20.025 = 1.96,to.05,392.023, 0.025.392.331
