1. 本人压根没接触过SPSS,又没有分可以给大家啊,有没有无私的大侠帮我做下啊!
1.
In an experiment to investigate the effect of color of paper (blue, green, orange) on response rates for questionnaires distributed by the “windshield method” in supermarket parking lots. 15 representative supermarket parking lots were chosen in a metropolitan area and each color was assigned at random to five of the lots. The response rates (in percent) follow. Assume that AVOVA model Yij = μi + εij is appropriate.
J
i
1
2
3
4
5
1
Blue
28
26
31
27
35
2
Green
34
29
25
31
29
3
Orange
31
25
27
29
28
a. 1.Obtain the fitted values.
b. 2.Obtain the residuals.
c. 3.Obtain the analysis of variance table.
d. 4.Conduct a test to determine whether or not the mean response rates for the three colors differ. Use a level of significance of α = 0.10. State the hypotheses, decision rule, and conclusion.
e. 5.When informed the findings, an executive said: “See? I was right all along. We might as well print the questionnaires on plain white paper, which is cheaper.” Does this conclusion follow from the findings of the study? Discuss.