For each of the following situations, identify the response variable and the pop

Question

For each of the following situations, identify the response variable and the populations to be compared, and give I, the ni, and N.

(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 assigns 40 of his hens to each of the three treatments.
Response variable:

(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 received 92 responses, of which 29 were from students who attend varsity football or basketball games only, 18were from students who also attend other varsity competitions, and 45 who did not attend any varsity games.
Response variable:

Explanation / Answer

Solution:

(a) Response: egg cholesterol level
Population: chickens with different diets or drugs
  
I = 3, N = 60, n1=n2=n3=40

(b) Response: rating on 7 points scale
Population: students from three different groups
  
I = 3, N = 92, n1=29, n2=18, n3=45

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