No Matter What Type of Population Value (Or Combination of Population

Multiple Choice

No matter what type of population value (or combination of population values) is being estimated using a confidence interval, what items should you be watching for, in order to best assess the results?

A) That the sample(s) selected represent the population(s) .
B) That the confidence level is clearly stated.
C) That any real differences for which the researchers imply a causal relationship came from a randomized experiment.
D) All of the above.