6A.9
Suppose a researcher wants to use a confidence interval to estimate an unknown population
proportion p . Which of the following is not a correct statement?

A) The endpoints of the interval can vary with each new sample.

B) The probability that p is in the interval is equal to the level of confidence for the interval.

C) Whether the interval captures p is not known with certainty.

D) The population proportion p is fixed, but the sample proportion p ˆ can vary from sample to sample.
E) The interval either does or does not capture p