Select the correct statement between the following list, describing the relationship between a sample and a population: 1) A sample is a group of...

Select the correct statement between the following list, describing the relationship between a sample and a population:

1) A sample is a group of populations that are subject to observation.

2) A sample is a group of subjects selected from a population to be studied.

3) A population and a sample are not related.

4) A population is a group of samples that may or may not be included in a study