7. 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. Company of mobile phone Туре of Pink Green Blue Yellow Total workers Executive 15 6 33 Middle 21 25 8 62 management Secretarial 33 36 11 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?

7. 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. Company of mobile phone Туре of Pink Green Blue Yellow Total workers Executive 15 6 33 Middle 21 25 8 62 management Secretarial 33 36 11 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?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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