CK-12 Probability and Statistics - Advanced

(Marvins-Underground-K-12) #1

http://www.ck12.org Chapter 2. Visualizations of Data



  1. (a)


Figure: Percentage of Municipal Waste Recycled by US States, 1998 (b) This data is fairly symmetric, is
centered around 25 or 26 percent, and has a spread of 43 percentage points (the range). (c)

In this example, we chose the stems to represent every 10 percentage points, which compresses the data and
forfeits some of the information about the shape of the distribution. Instead, we can split the stems in half
(10−14, and 15−19). This plot is much more informative about the true shape of the data.
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