Using the data of Exercise 15.5, perform a Kruskal Wallis test of the null hypothesis that the population mean test scores are the same for students assigned to the four teaching assistants.
Answer to relevant QuestionsGiven the following analysis of variance table, compute mean squares for between groups and within groups. Compute the F ratio and test the hypothesis that the group means are equal. 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, ...Four financial analysts were asked to predict earnings growth over the coming year for five oil companies. Their forecasts, as projected percentage increases in earnings, are given in the accompanying table. a. Prepare the ...A manufacturer of cereal is considering three alternative box colors-red, yellow, and blue. To check whether such a consideration has any effect on sales, 16 stores of approximately equal size are chosen. Red boxes are sent ...In some experiments with several observations per cell the analyst is prepared to assume that there is no interaction between groups and blocks. Any apparent interaction found is then attributed to random error. When such an ...
Post your question