1. Interaction Effect Assume that two-way analysis of variance reveals that there is a significant effect from an interaction between two factors. Why should we not proceed to test the effect from the row factor?
2. Why Not Use Two-Way ANOVA? Why can't we use the method of two-way analysis of variance with two-way tables described in Section 10-3?
3. Interaction Effect Refer to the Minitab display and test the null hypothesis that the amounts of DDT are not affected by an interaction between site and age. What do you conclude?
4. Effect of Site Refer to the Minitab display and assume that the amounts of DDT in the falcons are not affected by an interaction between site and age. Is there sufficient evidence to support the claim that site has an effect on the amount of DDT?
5. Effect of Age Refer to the Minitab display and assume that the amounts of DDT in the falcons are not affected by an interaction between site and age. Is there sufficient evidence to support the claim that age has an effect on the amount of DDT?