Here you will investigate the calculation and use of the median value of a data set.What is the median value of a data set? Why would you need to know how to find it if you already know how to find the mean? Is there really any difference? Can you think of a situation where the mean and median are exactly the same number?In the lesson below we will discuss all of these concepts, and you should have no problem with answering these questions when we review them after example C.
Grades 6 through 7 Material from CK-12Preview Assign
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Recognize that a measure of center for a numerical data set summarizes all of its values with a single number, while a measure of variation describes how its values vary with a single number.
Use measures of center and measures of variability for numerical data from random samples to draw informal comparative inferences about two populations.
Informally assess the degree of visual overlap of two numerical data distributions with similar variabilities, measuring the difference between the centers by expressing it as a multiple of a measure of variability.