Case 22.9 C22-09 Some psychologists believe that there are at least three different personality…

Case 22.9

C22-09 Some psychologists believe that
there are at least three different personality types: Type A is the aggressive
workaholic; type B is the relaxed underachiever; and type C displays various
characteristics of types A and B. The personnel manager of a large insurance
company believes that, among life insurance salespeople, there are equal
numbers of all three personality types and that their degree of satisfaction
and sales ability are not influenced by personality type. In a survey of 150
randomly selected salespeople, he determined their personality type, measured
their job
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Case 22.9

C22-09 Some psychologists believe that
there are at least three different personality types: Type A is the aggressive
workaholic; type B is the relaxed underachiever; and type C displays various
characteristics of types A and B. The personnel manager of a large insurance
company believes that, among life insurance salespeople, there are equal
numbers of all three personality types and that their degree of satisfaction
and sales ability are not influenced by personality type. In a survey of 150
randomly selected salespeople, he determined their personality type, measured
their job satisfaction on a seven-point scale (1 = very dissatisfied and 7 =
very satisfied) and determined the total amount of life insurance sold by each
during the previous year. The results were recorded using the following format:

Column 1: Personality type (A = 1; B = 2; C
= 3)

Column 2: Job satisfaction

Column 3:

Total amount of life insurance sold (in
hundreds of thousands of dollars) Test all three of the personnel manager’s
beliefs. That is, test to determine whether there is enough evidence to justify
the following conclusions:

a The proportions of each personality type
are different.

b The job satisfaction measures for each
personality type are different.

c The life insurance sales for each
personality type are different.

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