The results of a two-way ANOVA analysis following an experiment with level of illumination as one independent variable and knowledge of results as the other independent variable were as follows:
Illumination F (3, 108) = 5.34
Knowledge of results F (2, 108) = 2.34
Interaction (ill x kr) F (6, 108) = 1.12
-6) The number of illumination conditions was:

Question

Quizplus · Accepted Answer

The number of illumination conditions was determined by the degrees of freedom for the illumination factor, which is 3 in this case. Since each degree of freedom corresponds to one less than the number of levels, the number of illumination conditions is 4 (3+1). Therefore, the correct answer is B.

The Results of a Two-Way ANOVA Analysis Following an Experiment