A survey among the workers in a large manufacturing company was taken, in order to findout from which company the workers had purchased their mobile phones, and to find outwhether the choice of mobile phone company was related to the type of worker. The resultsare shown in the table below.Type of WorkersPinkGreenBlueYellowTotalExecutive1566633Middle management21258862Secretarial333611585Labourer402912889Total109963727269Is there evidence, at 5% level, that the choice of Phone Company is independent of the type ofworker?

A chi-square test of independence can be used to test whether two categorical variables are…

Answered: A survey among the workers in a large…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.4: Collecting Data

Problem 3E

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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.

Type of Workers	Pink	Green	Blue	Yellow	Total
Executive	15	6	6	6	33
Middle management	21	25	8	8	62
Secretarial	33	36	11	5	85
Labourer	40	29	12	8	89
Total	109	96	37	27	269

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

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