In ANOVA, a criterion by which the populations are classified is called a factor.

True

Explanation:

ANOVA means analysis of variance and it is a statistical tool used to find the difference of a group mean in the given sample. The difference can be identified with three or more independent groups.

ANOVA can be done as either one way test or two way test. Two way test can be with or without replica. When there is more than one independent factor then it is known as factorial ANOVA. Here the independent variable population is known as the factor.

answermarket demand;

answer: marginal utility of the fourth brownie is 0.

explanation: marginal utility is the addtional utility gained from the consumption of one more unit of a good. it is given by,

so, marginal utility at the 4th unit will be given by

since, the values are not given here, you can simply find marginal utility at fourth unit by subtracting total utility at 3rd unit from total utility at 4th unit.