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 }$
$\begin{array}{clccc}
& & \text { Low } & \text { Medium } & \text { High } \
\text { Major in } & \text { Humanities } & 50 & 20 & 50 \
\text { College } & \text { Nat. Science } & 30 & 60 & 30
\end{array}$

-In Data Set 13-4, an example of a main effect is
A) political attitudes
B) socioeconomic status
C) whether scores for humanities majors depend on socio-economic status
D) none of the other alternatives are correct.

Question

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 }$
$\begin{array}{clccc} 
& & \text { Low } & \text { Medium } & \text { High } \
\text { Major in } & \text { Humanities } & 50 & 20 & 50 \
\text { College } & \text { Nat. Science } & 30 & 60 & 30
\end{array}$

-In Data Set 13-4, an example of a main effect is
A) political attitudes
B) socioeconomic status
C) whether scores for humanities majors depend on socio-economic status
D) none of the other alternatives are correct.

Quizplus · Accepted Answer

A main effect refers to the impact of one independent variable on a dependent variable, ignoring other variables. In this case, socioeconomic status is an independent variable that could affect political attitudes (scores), making it an example of a main effect.

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