Select the best definitions of population and sample. a sample is the group from whom information is being collected. a population is the larger group the sample represents. a population is a number that describes an entire group. a sample is a number that describes a sub-collection of that group. a sample is the complete group under study. a population is a sub-collection of members selected from the sample a sample is a group selected in such a way that each member has a known chance of being in the group. a population is the larger group the sample represents. a population is the complete group under study. a sample is the sub-collection of members of the population from which data are actually collected.