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.