An experimenter says "it was a 3 by 3." What does this mean?
A) It was a time series design with three Xs and three Os.
B) It was a Latin Square design with three groups.
C) It was a factorial design with two variables, each had three levels.
D) It was a factorial design with three independent variables.

Question

Quizplus · Accepted Answer

This refers to a factorial design where there are two variables (factors), and each variable has three levels. A "3 by 3" factorial design means that there are two dimensions being studied, with each dimension having three variations or levels.

An Experimenter Says "It Was a 3 by 3