Chi-square test for independence of attributes.
The following table is from the publication of Vital and Health Statistics from the centers for Disease Control and Prevention/ National Center for Health Statistics. The individuals in the following table have an eye irritation, a nose irritation, or a throat irritation. They have only one of the three.
|
Age (yeas)
|
|
|
|
|
|
Type of irritation
|
18 - 28
|
30 - 44
|
45 - 84
|
65 and older
|
|
Eye
|
440
|
567
|
3490
|
59
|
|
Nose
|
924
|
1311
|
794
|
102
|
|
Throat
|
253
|
311
|
157
|
19
|
Is there sufficient evidence to reject the hypotheses that the type of ear, nose or throat irritation is independent of age group at a level of significance equal to 0.05?
a. resolve using the p value approach.
b. resolve using the classical approach.