Introduction to Frequency Graphs for One Quantitative Variable

The point is to learn how to "pile up" values that are close together to provide a two-dimensional picture of the data. This is the key idea on which much of the whole discipline of statistics is based. For now, just watch these four, in sequence. We go from graphing points on a number line to "piling up" points so it is easier to see how much data is "close together."

Go here to use visualize applets to explore each of these in much more detail.


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