The analysis of variance helps us compare the means of two, or more quantitative populations. Thus, it might be used by the manager of a farm who wants to know whether there is any difference in:

Group of answer choices

the average crop yield associated with the use of five types of fertilizer

the average crop yield associated with five alternative quantities of a given type of fertilizer that might be applied

the average crop yield associated with five alternative times at which a given quantity of a given type of fertilizer might be applied

all of these