What Next?

Class, if a researcher performs a One-Way Anova and the results are not significant (imagine you are testing the effectiveness of a drug on children, adults<50, and adults >50) -- meaning the researcher accepts the null hypothesis. Tell me what these results mean and then:

1. An analysis of interaction would need to be performed.
2. A post hoc analysis would be necessary.
3. A post hoc analysis would not be necessary.