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 where the sample size is the same week to week.

​a) This proportion tends to fluctuate from week to week. Name some reasons for the fluctuation in the statistic. Select all valid reasons below.

A. The proportion could be changing due to a large change in the composition of the population.

B. The proportion could be changing because​ people's attitudes are changing.

C. The proportion could be changing due to sampling​ error; different people are in the sample.

D. The proportion could be changing because the sampling size of the poll is changing.

Answer 1

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