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M119L06-page12 - DATA In practice(i.e “Empirically” we...

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(Lesson 6: Measures of Spread or Variation; 3-3) 3.26 Example 3 The scores on a test have mean μ = 50 points and SD σ = 10 points . By Chebyshev’s Theorem: At least 3 4 of the test scores are between 30 points and 70 points. At least 8 9 of the test scores are between 20 points and 80 points. PART G: 68-95-99.7 EMPIRICAL RULE FOR APPROXIMATELY NORMAL
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Unformatted text preview: DATA In practice (i.e., “Empirically”), we often see distributions that are approximately normal. Normal distributions are an important class of bell shaped distributions that we will revisit in Chapter 6 ....
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