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Unformatted text preview: Confidence Intervals for One-Way ANOVA Douglas Whitaker February 14, 2012 These notes correct the mistake I pointed out in class and a typo in the data that changes the ANOVA table. 1 Problem These data and description come from Applied Linear Statistical Models , 5th edition by Kutner, et. al. A consumer organization studied the effect of age of automibile owner on size of cash offer for a used car by utilizing 12 persons in each of three age groups (young, middle, elderly) who acted as the owner of a used car. A medium price, six-year-old car was selected for the experiment, and the “owners” solicited cash offers for this car from 36 dealers selected at random from the dealers in the region. Randomization was used in assigning dealers to “owners.” The offers (in hundred dollars) follow. Young 23 25 21 22 21 22 20 23 19 22 19 21 Middle 28 27 27 29 26 29 27 30 28 27 26 29 Elderly 23 20 25 21 22 23 21 20 19 20 22 21 2 One-Way ANOVA Computer output (from R) is below giving the important parts of the ANOVA table. We reject the null hypothesis of no differences in the means at the α = 0 . 05 level....
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This note was uploaded on 03/01/2012 for the course STA 3024 taught by Professor Ta during the Spring '08 term at University of Florida.
- Spring '08