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Chapter 5 The Standard Deviation and the Normal Model

Chapter 5 The Standard Deviation and the Normal Model. 68-95-99.7 rule. Mean and Standard Deviation (numerical). Histogram (graphical). 68-95-99.7 rule. The 68-95-99.7 rule; applies only to mound-shaped data. 68-95-99.7 rule: 68% within 1 stan. dev. of the mean. 68%. 34%. 34%.

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Chapter 4

Chapter 4. Stories Quantitative Data Tell. Comparing Groups. It is almost always more interesting to compare groups. With histograms, note the shapes, centers, and spreads of the two distributions. What does this graphical display tell you?. Comparing Groups (cont.).

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