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Students construct a dot plot from a data set.
Students calculate the mean of a data set and the median of a data set.
Students observe and describe that measures of center (mean and median) are nearly the same for distributions that are nearly symmetrical.
Students observe and explain why the mean and median are different for distributions that are skewed.
Students select the mean as an appropriate description of center for a symmetrical distribution and the median as a better description of center for a distribution that is skewed.
Teacher and Student versions of full lesson from engageNY
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