One-way ANOVA vs two-way ANOVA
I would like to ask for your clarification about the different results of one-way ANOVA and two-way ANOVA for the same factor.
At first I applied one way ANOVA with variable x, and I got significant results.
After that, I applied two-way ANOVA with variable x and variable z, now there are three values in the output:
- variable x: it changed to be NOT significant.
- variable z: not significant
- variable x * variable z: not significant,
Is this expected? should not the results for variable x be the same in both one-way and two-way ANOVA?
Appreciate your support!