Compare the overall average for the day shift to that for the night and swing shifts (refer to Table 15.5.4). Does it appear that there are large differences (more than two or three quality points) among shifts? Are these differences significant? How do you know?
Answer to relevant QuestionsIs there a significant interaction between supplier and shift in Table 15.5.4? Justify and interpret your answer. Refer to the data for problem 1. a. Find the critical value from the F table at the 0.1% level and report the result of the F test at this level. b. Summarize what this test has told you about any differences among these ads ...Break down the annual salaries into three groups according to training level (A, B, or C). a.* Draw box plots to compare these three groups. Comment on what you see. b.* Find the average for each training level, and ...a. What happens if there is an outlier in one of the samples in a test of two unpaired samples? For each case (very large or very small outlier), say what the rank of the outlier would be. b. Which statistical method ...Describe the similarities and differences between the sign test and the t test.
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