In Exercise 6.10 children were classified as those who never showed ADD behavior and those who showed ADD behavior at least once in the second, fourth, or fifth grade. If we do not collapse across...

In Exercise 6.10 children were classified as those who never showed ADD behavior and those who showed ADD behavior at least once in the second, fourth, or fifth grade. If we do not collapse across categories, we obtain the following data:

a.       Run the chi-square test.

b. What would you conclude, ignoring the small expected frequencies?

c. How comfortable do you feel with these small expected frequencies? If you are not comfortable, how might you handle the problem?