One of the more popular statistics reported in the media is the president\'s job

Question

One of the more popular statistics reported in the media is the president's job approval rating. The approval rating is reported as the proportion of the population who approve of the job that the sitting president is doing and is typically based on a random sample of registered voters. (This is a reading assessment question. Be certain of your answer because you only get one attempt on this question.) This proportion tends to fluctuate from week to week. Name some reasons for the fluctuation in the statistic. Select all valid reasons below. A B. C. The proportion could be changing due to sampling error; different people are in the sample. The proportion could be changing because the sampling size of the poll is changing. The proportion could be changing because people's attitudes are changing. D. The proportion could be changing due to a large change in the composition of the population.

Explanation / Answer

This is a case of a sampling error because we are only taken some of the voters in out sample and these voters are not the same everytime, therefore the proportion could be changing due to the sampling error. Different samples have different set of the voters.

Therefore A is the correct answer here.

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