Surveys and Samples

Learn how to use surveying and sampling to collect accurate data.

Grades 8 through 9 Material from CK-12

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Recognize a statistical question as one that anticipates variability in the data related to the question and accounts for it in the answers. For example, How old am I? is not a statistical question, but How old are the students in my school? is a statistical question because one anticipates variability in students ages


Summarize numerical data sets in relation to their context, such as by:



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.