A researcher used ANOVA to examine the effects of different types of diet on the weight gains of sheep. Specifically, he wants to see if the effect of diet type is different for sheep of different ages. Ten sheep were assigned to each of the four diet groups. Within each diet group, half of the sheep were younger than one year old, and the other half were older than one year old. How many factors are in this experiment and how many levels do these factors have?
A) 1 factor; 4 levels
B) 1 factor; 8 levels
C) 2 factors; one with 4 levels, one with 2 levels.
D) 2 factors; one with 10 levels, one with 5 levels.

Question

Quizplus · Accepted Answer

There are two factors in this experiment: diet type and age of the sheep. Diet type has 4 levels (the four different diets), and age has 2 levels (younger than one year old and older than one year old).

A Researcher Used ANOVA to Examine the Effects of Different