A 95% Confidence Interval for the Expected Value of Y

Multiple Choice

A 95% confidence interval for the expected value of Y is constructed first for x = 2, then for x = 3, then for x = 4, and finally for x = 5. This yields a set of four confidence intervals for which the joint or simultaneous confidence level is guaranteed to be at least

A) 95%
B) 90%
C) 85%
D) 80%
E) 75%