For each of the following situations, identify the response variable and the populations to be compared, and giveI, then_i, andN.

(a) A poultry farmer is interested in reducing the cholesterol level in his marketable eggs. He wants to compare two different cholesterol-lowering drugs added to the hen's standard diet as well as an all-vegetarian diet. He assigns40of his hens to each of the three treatments.

Response variable:

number of marketable eggs laid

diet cholesterol level

caloric intake

egg cholesterol level

number of hens

Populations: (Select all that apply.)

hens on a standard diet and receiving one of two cholesterol-lowering drugs

all eggs laid on a farm

eggs with different cholesterol levels

all hens on a farm

hens on an all-vegetarian diet

I=

n₁=

n₂=

n₃=

N=

(b) A researcher is interested in students' opinions regarding an additional annual fee to support non-income-producing varsity sports. Students were asked to rate their acceptance of this fee on a five-point scale. She received96responses, of which31were from students who attend varsity football or basketball games only,22were from students who also attend other varsity competitions, and43who did not attend any varsity games.

Response variable:

number of students who attend varsity games

varsity sport played

acceptance rating on a five-point scale

amount of annual fee paid

number of games attended

Populations: (Select all that apply.)

students who play sports

students who do not attend any varsity games

students who attend other varsity competitions

students who attend varsity football or basketball games

students who pay an annual fee

I=

n₁=

n₂=

n₃=

N=

(c) A professor wants to evaluate the effectiveness of his teaching assistants. In one class period, the51students were randomly divided into three equal-sized groups, and each group was taught power calculations from one of the assistants. At the beginning of the next class, each student took a quiz on power calculations, and these scores were compared.

Response variable:

number of questions on the quiz

rating of the assistant on a five-point scale

rating of the professor on a five-point scale

quiz score

course grade

Populations: (Select all that apply.)

the three teaching assistants

students passing the course

students who like their TA

students in the three TA groups

all students at the school

I=

n₁=

n₂=

n₃=

N=