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Chapter 15: Chi-Square Tests
689
Table 15-9:
Expected Frequencies with Marginal Totals
for
Example 15-6
The
test statistic is computed in the same manner as we did when we did
the goodness-of-fit test. A test to answer the question as to whether females
feel differently or the same from males, about the three criteria used in
purchasing a smart phone is given next. Use a significance level
= 0.01
Solution:
Since
= 0.01 and the number of degrees of freedom
= (2 –1)(3 –1) = 2, then
= 9.210. We can use the
Critical Values
for the Chi-Square Distribution
workbook as shown in
Figure 15-23
.
Figure 15-23:
Chi-Square Critical Value for
Example 15-6
From previous information and computations,
=
4. 113
2)4. 113 80(
37
2)37 35(
4.81
2)4.81 50(
6.66
2)6.66 100 (
Click here for the Critical Values for the Chi-Square Distribution Workbook