1. ## Population and sample...

I want to know if im insane.. because im so sure my answer is correct, i dont know how it can be even perceived as the slightest bit of wrong
for part (c) and (d)

That is from my first exam in stats... please let me know if my answer is correct. I have questioned my professor, but hes not explaining why its wrong...

2. I would say the teacher is correct.

Think of it like this, you are not taking a sample of people from a population of people; rather, you are taking a sample of measurements from a population of measurements. In regards to your problem, we are only interested in the recorded response of each person; however, you wrote (for part c), “voters in his district that gave a yes or no response,” which implies your population is a collection of voters (people). If you would have said, “the response of voters in his district,” then clearly our population is a collection of responses (measurement on the person) and not a collection of people.

For example, if you want to study the height of a certain tree in some area, your population is the height of every tree (not the collection of every tree) in the area and your sample is a sub-collection of heights from the population (not a subset of trees from the population).

Does that help?

3. Ok now i understand. That explanation was VERY helpful.

Thank you sir.