In the study of Example 15.1, independent random samples of six advertisements from True Confessions, People Weekly, and Newsweek were taken. The fog indices for these advertisements are given in the accompanying table. Test the null hypothesis that the population mean fog indices are the same for advertisements in these three magazines and compute the minimum significant difference and indicate which subgroups have different means.
Answer to relevant QuestionsFor the one-way analysis of variance model, we write the jth observation from the ith group as Xij = µ + Gi + eij where m is the overall mean, Gi is the effect specific to the ith group, and eij is a random error for the ...For the data of Exercise 15.4, use the Kruskal-Wallis test of the null hypothesis that the population mean sales levels are identical for three box colors. Refer to Exercise 15.10. Without assuming normal population distributions, test the null hypothesis that the population mean times spent outside the classroom on teaching responsibilities are the same for assistant, ...An agricultural experiment designed to assess differences in yields of corn for four different varieties, using three different fertilizers, produced the results (in bushels per acre) shown in the following table: a. Prepare ...Consider an experiment with treatment factors A and B, with factor A having four levels and factor B having three levels. The results of the experiment are summarized in the following analysis of variance table. Compute the ...
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