Apolitical party sends a mail survey to 1500 randomly selected registered voters in a community. the survey asks respondents to give an opinion about the job performance of the current president. of the 1500 surveys sent out, 480 are returned, and of these, only 120 say they're satisfied with the president's job performance.
1.) the population is
a) the 120 respondents satisfied with the president's job performance.
b) the 480 respondents that answered the survey.
c) all registered voters in this community.
d) the 1500 registered voters in the community selected to receive this survey.
2.) the sample is
a) the voters in his district.
b) the 1500 randomly selected voters receiving the questionnaire.
c) the 120 voters surveyed that are satisfied with the president's job performance.
d) the 480 surveys returned.
3.) this is an example of
a) a survey with little bias because 1500 voters represent an important part of his district.
b) a survey containing nonresponse.
c) a survey with little bias since people understand whether they approve of the president's job performance.
d) all of the above