Consider the following statements concerning confidence intervals: A. A confidence interval can only use information from the sample data to construct an interval estimate for a sample statistic not a...

Consider the following statements concerning confidence intervals:

A. A confidence interval can only use information from the sample data to construct an interval estimate for a sample statistic not a population parameter.

B. An interval estimate is often preferred to a point estimate because an interval estimate provides more information.

C. To derive a confidence interval for a population mean when the population variance is unknown AND the sample size is small (<30), the="" population="" mean="" needs="" to="" satisfy="" that="" it="" is="" normally="">

only A is true

only B is true

only A and C are true

only B and C are true

A, B and C are true