Rating the environment. A Gallup Poll asked the question How would yourate the overall
Chapter 0, Problem 16.3(choose chapter or problem)
Rating the environment. A Gallup Poll asked the question How would yourate the overall quality of the environment in this country todayas excellent, good, only fair, or poor? In all, 46% of the sample rated the environment as goodor excellent. Gallup announced the polls margin of error for 95% confidence as3 percentage points. Which of the following sources of error are included in themargin of error?(a) The poll dialed telephone numbers at random and so missed all peoplewithout phones.(b) Nonresponsesome people whose numbers were chosen never answered thephone in several calls or answered but refused to participate in the poll.(c) There is chance variation in the random selection of telephone numbers.
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