Four students are instructed to calculate a confidence interval based on the same sample mean (xbar: 0.76) and the same sample standard deviation s. However, each student is given a different sample...

Four students are instructed to calculate a confidence interval based on the same sample mean (xbar: 0.76) and the same sample standard deviation s. However, each student is given a different sample size and confidence level. The following are the intervals obtained by the four students. Which of the following must be incorrect?

A. (0.09, 1.43)

B. (-1.11, 2.89)

C. (-0.57, 2.09)

D. (-2.22, 3.74)