STION $11$

Sketch a line graph for each matrix and state whether or not the data indicates the presence of a main effect of factor A$,$ a main effect for factor B$,$ and an interaction effect between A and B$.$

Factor B

Factor A

B$1$

B$2$

A$1$

n $=5$

T $=25$

n $=5$

T $=15$

A$2$

n $=5$

T $=20$

n $=5$

T $=30$