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This 10 question worksheet aligns with Common Core standard 7.SP.A.1. In this worksheet students will determine is samples describe in the problems are representative of the population studied and describe why or why not. Eight of the ten questions are about presidential polling while there is a short break where Chet polls his fellow Glasshouse residents about breakfast. Can be used as an in class assignment, a homework assignment, or individual questions can be used to facilitate class discussion. It doesn't even have to be used in a math class as this topic is relevant to other classes as well! Plus it is free. 4 page PDF.
to see state-specific standards (only available in the US).
Understand that statistics can be used to gain information about a population by examining a sample of the population; generalizations about a population from a sample are valid only if the sample is representative of that population. Understand that random sampling tends to produce representative samples and support valid inferences.