When Drawing Statistical Inferences About the Population When Using Variables

Multiple Choice

When drawing statistical inferences about the population when using variables sampling,

A) a confidence interval cannot be calculated.
B) there is always a possibility that the sample is not sufficiently representative of the population to provide a sample mean or standard deviation reasonably close to those of the population.
C) the auditor does not know the reliability for the statistical inference process that is used to draw the conclusions.
D) all of the above are correct.