If you plotted the results of a factorial study using lines whose slopes represents mean differences across different experimental conditions,the presence of a statistical interaction would show up in the form of:
A)lines that are separated by a statistically significant distance
B)lines that generally slope upwards
C)lines that generally slope downward
D)nonparallel lines

Question

Quizplus · Accepted Answer

Nonparallel lines would indicate the presence of a statistical interaction, as the mean differences across experimental conditions would differ depending on the level of the other independent variable. If the lines were parallel, it would suggest that the factor levels have a consistent effect regardless of the level of the other factor.

If You Plotted the Results of a Factorial Study Using