Categorical Association
1. The problem asks to identify two pairs of categorical variables: one pair that might be associated and one pair that might not be associated.
2. Let's define the pairs:
- Associated variables: Gender (Male, Female) and Preference for a new product (Like, Dislike)
- Not associated variables: Eye color (Blue, Brown) and Favorite fruit (Apple, Banana)
3. Create two-way tables with 100 total values each.
Associated variables table:
| Gender | Like | Dislike | Total |
|--------|------|---------|-------|
| Male | 30 | 20 | 50 |
| Female | 40 | 10 | 50 |
| Total | 70 | 30 | 100 |
Not associated variables table:
| Eye Color | Apple | Banana | Total |
|-----------|-------|--------|-------|
| Blue | 25 | 25 | 50 |
| Brown | 25 | 25 | 50 |
| Total | 50 | 50 | 100 |
4. Explanation:
- For the associated variables, the distribution of preferences differs by gender: 60% of females like the product compared to 60% of males disliking it, indicating an association.
- For the not associated variables, the distribution of favorite fruit is the same regardless of eye color, showing no association.
Final answer: The first pair shows association because the preference depends on gender, while the second pair shows no association because the favorite fruit is independent of eye color.