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An article in Psychology and Marketing describes four variables that have been found to impact the effectiveness of commercials for high-performance auto- mobiles: sincerity, excitement, ruggedness, and sophistication.24 Suppose that the following data are available on commercials' effectiveness and these variables, all on appropriate scales.
Commercial Effectiveness
AssessedSincerity
AssessedExcitement
AssessedRuggedness
AssessedSophistication
75
12
50
32
17
80
10
55
18
71
20
48
33
16
90
15
57
92
21
56
34
19
60
42
14
58
41
30
65
22
49
31
81
54
11
95
59
76
51
61
29
Is there a regression relation here between commercial effectiveness and any of the independent variables? Explain.
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