A StepbyStep Introduction to Statistics for Business
Second Edition
Chapter 11: ChiSquared (x2) Tests of Fit
Answers for all ‘Test Yourself’ questions from the book to check your performance and widen your overall understanding of the contents.

 df = 5
 df = 9
 df = 28
 df = 1

 χ^{2}_{crit} = 7.815
 χ^{2}_{crit} = 11.345
 χ^{2}_{crit} = 12.592
 χ^{2}_{crit} = 58.619

 3
 .05
 5.991
 No, the results were not statistically significant.
 A researcher selects a sample of 40 people to investigate the relationship between brand preference (Brand A or Brand B) and gender (male or female). Of the 20 males in the sample, 5 prefer Brand A. Of the 20 females in the sample, 12 prefer Brand A. Based on the information in this scenario:
 8.5
 11.5
 8
 5