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The Gallup Poll

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The Gallup Poll

When Gallup conducts a national opinion poll, the starting place is where all or most Americans are equally likely to be found. That place is in their home, which is the starting place for nearly all national polling. The actual target audiences, referred to as "national adults", are aged 18 and over, living in telephone households within the United States. What I don 't understand is that Gallup excludes college students living on campus, armed forces living on military bases, prisoners, hospitalized people, and anyone else who is living institutionalized. I think these exclusions are unfair. The article explains that the reasoning for not including the people who live in the places mentioned above is because of …show more content…

Another thing I found interesting in this article is that Gallup as well as other major organizations use sample sizes of 1,000-1,500 because these sample sizes are enough to give a good balance of accuracy opposed to much larger samples which would be very expensive. I hadn 't considered expense when it comes to collecting a sample but apparently it can be very costly. For instance, if a sample size of 4,000 were selected each time there was a poll, the increase in accuracy would be very small, and would not justify the increase in cost. Now, I believe this to be true because I do think that the people behind things like the Gallop Poll are very smart statisticians and would not lie when it comes to what effects the sample size has on the accuracy of results. It makes absolute sense to me that specific ways of measuring the accuracy of samples have been done for many years and the processes and results have been analyzed thoroughly with each design.
The poll of such a small number of people do not invalidate the results since for instance, as stated in the article, if the sample size was raised to 2,000 instead of 1,000, for a Gallup Poll there would be a gain of only 1% in terms of accuracy, and a 100% increase in terms of cost. I can understand that looking at results with a margin of error of plus or minus 3 percentage points is reasonable compared to spending a lot more money and only change the margin of error by

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