# post2 - adult residents during April 2006 to ascertain how...

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1 STAT 511-2 Spring 2012 Jan 11, 2012 Jun Xie 1. Finish the remaining contents from last lecture on graphical representations of data. 1.2 Pictorial methods in descriptive statistics Making histogram Example stem length for peppers (n=15) 12.4 12.2 13.4 10.9 12.2 12.1 11.8 13.5 12.0 14.1 12.7 13.2 12.6 11.9 13.1 min = 10.9, max = 14.1, range = 14.1 10.9 = 3.2 choose bin width of 0.5 and starting point of 10.5 to give "coverage" of 10.5 14.5 this is 8 bins. See the excel file histogram.xls Histogram shape Example 12 Weights of 124 players listed on the rosters of the San Francisco 49ers and the New England Patriots Symmetric unimodal Bimodal Skewed Summarize qualitative data Example 13 The Public Policy Institute of California carried out a telephone survey of 2501 California

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Unformatted text preview: adult residents during April 2006 to ascertain how they felt about various aspects of K-12 public 2 education. One question asked was “Overall, how would you rate the qu ality of public schools in your neighborhood today?” 1.3 Measures of location Sample Mean Example 14 crack length of iron and steel ( m) x 1 = 16.1 x 2 = 9.6 x 3 = 24.9 x 4 = 20.4 x 5 = 12.7 x 6 = 21.2 x 7 = 30.2 x 8 = 25.8 x 9 = 18.5 x 10 = 10.3 x 11 = 25.3 x 12 = 14.0 x 13 = 27.1 x 14 = 45.0 x 15 = 23.3 x 16 = 24.2 x 17 = 14.6 x 18 = 8.9 x 19 = 32.4 x 20 = 11.8 x 21 = 28.5 With x i = 444.8 the sample mean is 444.8/21 = 21.18 m. Population mean, denoted as...
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## This note was uploaded on 02/20/2012 for the course STAT 511 taught by Professor Bud during the Fall '08 term at Purdue.

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post2 - adult residents during April 2006 to ascertain how...

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