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Unformatted text preview: • ¯ x is the expected value (mean) • σ x is the standard deviation • To ﬁnd variance, you would need to recall that Var ( X ) = σ 2 Example 2 : Referring to Example 1, a) Find the variance and standard deviation of X . b) Find the variance and standard deviation of Y . Example 3: The percent of the voting age population who cast ballots in presidential election years from 1980 through 2000 are given below: Election Year 1980 1984 1988 1992 1996 2000 Turnout Percentage 53 53 50 55 49 51 Find the mean and standard deviation of the voter turnout. Section 8.3 Highly Suggested Homework Problems: 3, 5, 7, 9, 11, 13, 15, 22 8...
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 Fall '08
 JillZarestky
 Histograms, Probability, Standard Deviation, Variance, Probability theory, Kendra Kilmer

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