We looked at measures of central tendency, which we saw were various ways of representing the “middle” of a data set. But central tendency isn’t the only thing we’re interested in when it comes to data. We also want to know about spread, which is how, and by how much, our data set is spread out around its center. We also call measures of spread measures of dispersion, or scatter.
Read MoreIn this lesson, we want to see what happens to our measures of central tendency and spread when we make changes to our data set. Specifically the changes made either by changing all the values in the set at once, or by adding a single data point to, or removing a single data point from, the data set.
Read MoreMeasures of central tendency are different ways we’ve come up with to describe the “middle,” “center,” or most typical value of the data. They include the mean, the median, and the mode, and we need to know how to find all three.
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