The Gallup organization periodically polls adults living in the U.S. about the issue of immigration. Participants are asked whether they think immigration should increase, decrease, or stay at present levels. When this question was asked in June of 2016, 38% of respondents said they thought immigration should decrease. When it was asked in June of 2018, 29% of respondents said they thought immigration should decrease. For the purpose of this problem, suppose that
. The Gallup organization periodically polls adults living in the U.S. about the issue of
immigration. Participants are asked whether they think immigration should increase,
decrease, or stay at present levels. When this question was asked in June of 2016, 38%
of respondents said they thought immigration should decrease. When it was asked in
June of 2018, 29% of respondents said they thought immigration should decrease.
For the purpose of this problem, suppose that the sample size was 200 in both 2016 and
2018, and that each represented a simple random sample of adults living in the U.S. at
that time. Is there evidence for a real change in opinion among U.S. adults between
2016 and 2018, or do you think the results are just due to chance? Carry out all the
steps for a two-sample z test and state your conclusion
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