Which of the following correctly describes the relationship between a sample and a population? a. A population and a sample are not related. b. A population is a subset of a sample group c. A sample...

Which of the following correctly describes the relationship between a sample and a population? a. A population and a sample are not related. b. A population is a subset of a sample group c. A sample is a group of populations that are subject to observation. d. A sample is a group of subjects selected from a population to be studied.