Answer to Question #55364 in Statistics and Probability for josh

Question

Anytime we conduct a survey we must take care to avoid under coverage. suppose we plan to select 500 names from the city phone book, call their homes between noon and 4pm and interview whoever answers, anticipating contacts with at least 200 people

a)why is it difficult to use a simple random sample here?
b) describe a more convenient but still random sampling strategy
c) what kinds of households are likely to be included in the eventual sample of the opinion?
d) suppose instead that we continue calling each number perhaps in the morning or evening until a adult is contacted and interviewed. how does this improve the sampling design?
e) random digits dialing machines can generate the phone calls for us. how would this improve our design? is anyone still excluded?