Data Set 13-4: the Number in Each Cell Is the Mean

Data Set 13-4: The number in each cell is the mean of 5 participants on the Loose Label Political Opinion Poll (high scores = liberal, low scores = conservative) .
$\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$$\text { Socioeconomic Status }$
$\begin{array}{clccc} & & \text { Low } & \text { Medium } & \text { High } \\\text { Major in } & \text { Humanities } & 50 & 20 & 50 \\\text { College } & \text { Nat. Science } & 30 & 60 & 30\end{array}$

-Data Set 13-4 is an example of

A) a simple ANOVA
B) a 2 x 2 factorial ANOVA
C) an experiment with df_tot = 30
D) none of the other alternatives are correct.