$$\begin{array} { l c c }
\text { Source } & \text { d.f. } & \text { Sum of Squares } \
\text { Model } & 3 & 213.88125 \
\text { Error } & 20 & 11.208333 \
\text { Total } & 23 & 225.0895
\end{array}$$
-Consider the above one-way ANOVA table.How many groups (treatment levels)are included in the study?
A)3
B)4
C)6
D)20
E)24

Question

$$\begin{array} { l c c } 
\text { Source } & \text { d.f. } & \text { Sum of Squares } \
\text { Model } & 3 & 213.88125 \
\text { Error } & 20 & 11.208333 \
\text { Total } & 23 & 225.0895
\end{array}$$
-Consider the above one-way ANOVA table.How many groups (treatment levels)are included in the study?
A)3
B)4
C)6
D)20
E)24

Quizplus · Accepted Answer

The number of groups (treatment levels) in the study is one more than the degrees of freedom for the model, which is 3 + 1 = 4.

-Consider the Above One-Way ANOVA Table