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A researcher has developed three different designs for a computer keyboard. A sample of n = 60 participants is obtained, and each individual tests all three keyboards and identifies his or her favorite. The frequency distribution of preferences is as follows: Design A Design B Design C 23 12 25 n = 60 a. What is the df value for the chi-square statistic? b. Assuming that the null hypothesis states that there are no preferences among the three designs, find the expected frequencies for the chi-square test.

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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

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Chapter
Section
Chapter 15.2, Problem 3LC
Textbook Problem

A researcher has developed three different designs for a computer keyboard. A sample of n = 60 participants is obtained, and each individual tests all three keyboards and identifies his or her favorite. The frequency distribution of preferences is as follows:

Design A Design B Design C  
23 12 25 n = 60
  • a. What is the df value for the chi-square statistic?
  • b. Assuming that the null hypothesis states that there are no preferences among the three designs, find the expected frequencies for the chi-square test.

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