Common Core: 6.SP.5


Author: Ryan Backman

This lesson will explain finding the mean of a data set.

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Introduction to Statistics

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  • Mean

    The "average" value of a data set. It is obtained by dividing the sum of the values by the number of values in the set.

  • Summation Notation

    A notation that uses the Greek letter sigma to state that values should be added together.

  • Weighted Mean/Average

    A way of calculating a mean when not all the values count for the same amount. Each value should be multiplied by its weight and added together, then divide the sum by the sum of the weights.