I'm confused upon how to do this question:

Question

tkhunny · Answer

Who is the population involved with the activity?

The first is NOT all U.S. Americans.  Can they all vote?

howard-wolowitz · Answer

So for the first one its, Legal aged U.S citizens. Voting

howard-wolowitz · Answer

The second one is the person drinking it. A water guage or the person drinking it.

howard-wolowitz · Answer

I'm not sure about number 3

michele_laino · Answer

for part 3, if the poll is made in The United States of America, then the sample is composed by all American citizens, and what is the population?

howard-wolowitz · Answer

the population for numer 3 would be the boys and girls i tinhk

howard-wolowitz · Answer

what would the sample for number 3 be then

michele_laino · Answer

I think it is represented by all world people

michele_laino · Answer

whereas the sample, as I wrote before, is represented by all American citizens

michele_laino · Answer

under the hypothesis which I have indicated