In a Study Designed to Measure Aggressive Play of Boys

Multiple Choice

In a study designed to measure aggressive play of boys versus girls who attend public or private schools, which of the following statements is least correct?

A) There may be a simple main effect of gender.
B) There may be a simple main effect of the type of school.
C) There may be an effect of aggressive play.
D) There may be a Gender × type of school interaction.