A psychologist wishes to study the effects of gender and age on mood. Samples of 5 subjects are in each of 6 treatment conditions. There are three levels of Factor A (i.e., kids, adults and the elderly) and two levels of Factor B (i.e., males and females). Each sample group is administered a standard mood questionnaire. Are there gender differences, age differences or an interaction between age and gender? Test at the .05 level of significance.
1. Why is a twoway ANOVA appropriate?
2. What is (are) the independent variable(s)?
3. What is the dependent variable(s)?
4. What is (are) the null hypothesis(es)?
5. What is (are) the alternative hypothesis(es)?
6. What is (are) the critical value(s)?
7. What is (are) the obtained value(s)?
8. What statistical decision(s) do you make?
9. Write a conclusion.