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A communications company has developed three new designs for a cell phone. To evaluate consumer response, a sample of 60 college students and 60 older adults is selected and each person is given all three phones to use for I week. At the end of the week, the participants must identify which of the three designs they prefer. The distribution of preference is as follows: Design 1 Design 2 Design 3 Student 27 20 13 60 Older Adult 21 34 5 60 48 54 18 a. Do the data indicate that the distribution of preferences for older adults is significantly different from the distribution for college students’ Test with α = .05. b. Compute the phi-coefficient to measure the strength of the relationship.

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Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
Publisher: Cengage Learning
ISBN: 9781133956570
BuyFind

Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
Publisher: Cengage Learning
ISBN: 9781133956570

Solutions

Chapter
Section
Chapter 15, Problem 4RE
Textbook Problem

A communications company has developed three new designs for a cell phone. To evaluate consumer response, a sample of 60 college students and 60 older adults is selected and each person is given all three phones to use for I week. At the end of the week, the participants must identify which of the three designs they prefer. The distribution of preference is as follows:

  Design 1 Design 2 Design 3  
Student 27 20 13 60
Older Adult 21 34 5 60
  48 54 18  
  • a. Do the data indicate that the distribution of preferences for older adults is significantly different from the distribution for college students’ Test with α = .05.
  • b. Compute the phi-coefficient to measure the strength of the relationship.

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