A Researcher Used ANOVA to Examine the Effects of Paper

Multiple Choice

A researcher used ANOVA to examine the effects of paper colors on reading speed. She prepared reading materials printed on three different colors of paper: white paper, yellow paper, and blue paper. She then randomly assigned 20 readers to each type of paper. How many factors are involved in this experiment and how many levels are in the factor(s) ?

A) 1 factor with 3 levels
B) 1 factor with 20 levels
C) 3 factors with 20 levels
D) 3 factors with 60 levels