Answered: Do the data provide sufficient evidence…

Do the data provide sufficient evidence that the production of mobile phone users who prefer the producer’s brand is less than 0.20

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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Question

A producer of mobile phones claims that 20% of all mobile phone users prefer its product. To test the claim, a random sample of 151 mobile phone users is selected and it turns out that 28 prefer the producer’s brand. Do the data provide sufficient evidence that the production of mobile phone users who prefer the producer’s brand is less than 0.20? Test, using ? = 0.01.

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