Answer: Samples of six different brands of diet/imitation
Chapter 10, Problem 10.26(choose chapter or problem)
Samples of six different brands of diet/imitation margarine were analyzed to determine the level of physiologically active polyunsaturated fatty acids (PAPFUA, in percentages), resulting in the following data: Imperial 14.1 13.6 14.4 14.3Parkay 12.8 12.5 13.4 13.0 12.3Blue Bonnet 13.5 13.4 14.1 14.3Chiffon 13.2 12.7 12.6 13.9Mazola 16.8 17.2 16.4 17.3 18.0Fleischmanns 18.1 17.2 18.7 18.4(The preceding numbers are fictitious, but the samplemeans agree with data reported in the January 1975 issue ofConsumer Reports.)a. Use ANOVA to test for differences among the true averagePAPFUA percentages for the different brands.b. Compute CIs for all (i j)s.c. Mazola and Fleischmanns are corn-based, whereas theothers are soybean-based. Compute a CI for[Hint: Modify the expression for V() that led to (10.5) inthe previous section.]
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