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. Complete parts​ (a) and​ (b) below.

​(This is a reading assessment question. Be certain of your answer because you only get one attempt on this​ question.)

​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 sampling​ error; different people are in the sample.

B.

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

C.

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

D.

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

Answer 1

Answer

option A is correct because sampling error in the proportion can change based on the different people. So, this is a correct option.

option B is incorrect because there will be no change in the proportion due to any change in the composition of the population.

option C is incorrect because proportion will not be affected due to any change in the sampling size as the proportion is calculated on the basis of general view.

option D is correct because people's attitude can easily fluctuate the proportion because people keep on changing their attitude frequently based on the social environment.

only option A and D are correct