Question

The following data are from an experiment designed to investigate the perception of corporate ethical values among individuals specializing in marketing (higher scores indicate higher ethical values).

Marketing Managers	Marketing Research	Advertising
6	5	6
5	5	7
4	4	6
5	4	5
6	5	6
4	4	6

1. [6] Use Minitab and α = 0.05 to test for significant differences in perception among the three groups. In the calculations section, insert only that portion of your output that is pertinent. Complete the components of the test.

[1] Hypothesis:         

           

[1] Decision rule:

[2] Calculations (insert only the portion of your Minitab output pertinent to this part):

           

[2] Conclusions:

2. [1] If you determined a significant difference in part a, use Minitab to conduct a Fisher’s LSD procedure to determine where the differences occur. Insert the pertinent output.

3. [3 – 1 for output; 2 for conclusions] Develop a boxplot (using Minitab). Use a single plot and put all three boxplots together. Use the plot and your results in part b to assess which group is the most ethical and which is the least.

Plot (shrink down by using the handle on the bottom right):

Answer 1

Decision Rule:

Since Value of F=7.00>3.68 so we reject H0 at 5% level of significance and conclude that there is  significant differences in perception among the three groups.

b.

From above test we see that Group "Advertising" is significantly different from other groups.

c.

Group "Advertising" is the most ethical and "Marketing Research" is the least.