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ls there evidence, at 5% level, that the choice of Phone Company is independent of the type of worker?

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter8: Sequences, Series, And Probability

Section8.CT: Chapter Test

Problem 16CT: How many six-digit license plates can be made if no plate begins with 0 or 1?

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Question

A survey among the workers in a large manufacturing company was taken, in order to find
out from which company the workers had purchased their mobile phones, and to find out
whether the choice of mobile phone company was related to the type of worker. The results
are shown in the table below.

ls there evidence, at 5% level, that the choice of Phone Company is independent of the type of
worker?

Company of mobile phone
Yellow
Туре of
workers
Pink
Green
Blue
Total
Executive
15
6
6
33
Middle
21
25
8
8
62
management
Secretarial
33
36
11
85
Labourer
40
29
12
8
89
Total
109
96
37
27
269
00

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