Chapter 15.2, Problem 3LC

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

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.

**a.**

To determine

Degrees of freedom value for the chi-square statistic.

Explanation

**Given info:**

For a computer keyboard, three different designs were developed by a researcher. A sample of size 60 were taken and obtained each individual tests for three keyboard and the favourite one was identified.

**Calculation:**

*Degree of freedom is calculated by simply with relation.*

**b.**

To determine

Expected frequencies of the chi-square test.

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