Sampling a few people in a group is a way to find out information about a group of people. It is difficult to accurately and fairly gather information without asking everyone.
Survey: a method of gathering information about a group
Population: everyone that makes up a specific group (for example - all teenagers)
Sample: a part of the group used to represent a population
Random Sample: sample in which every person in a population has an equal chance of being selected
For example: It would be unfair to only survey your friends, and use the data as a representative of all sixth graders. Just asking your friends, means they were NOT randomly selected.
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