Difference between One-way ANOVA & Two-way ANOVA

One-way ANOVA	Two-way ANOVA
There must be three or more groups. If there are two groups only, you can use a 2-independent-sample t-test.	There are two grouping factors.
The independent variable is called the grouping factor. The group is called the level.	Unlike one-way ANOVA, in this design it is allowed to have fewer than three levels (groups) in each factor.
In this example, there is one factor and three levels (Group 1-3). Group1 Group2 Group3 Mean 10 11 12	In this example, there are two factors: A and B. In each factor, there are two levels: 1 and 2. Thus, it is called a 2X2 ANOVA between-subject design. A1 A2 B1 10 11 B2 12 13