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Mathematics, 13.07.2021 23:20, xandraeden32
Government shutdown. The United States federal government shutdown of 2018ā2019 occurred from December 22, 2018 until January 25, 2019, a span of 35 days. A Survey USA poll of 614 randomly sampled Americans during this time period reported that 48% of those who make less than $40,000 per year and 55% of those who make $40,000 or more per year said the government shutdown has not at all affected them personally. A 95% confidence interval for (p<40K ā pā„40K), where p is the proportion of those who said the government shutdown has not at all affected them personally, is (-0.16, 0.02). Based on this information, determine if the following statements are true or false, and explain your reasoning if you identify the statement as false.
(a) At the 5% significance level, the data provide convincing evidence of a real difference in the proportion who are not affected personally between Americans who make less than $40,000 annually and Americans who make $40,000 annually.
(b) We are 95% confident that 16% more to 2% fewer Americans who make less than $40,000 per year are not at all personally affected by the government shutdown compared to those who make $40,000 or more per year.
(c) A 90% confidence interval for (p<40K ā pā„40K) would be wider than the (ā0.16, 0.02) interval.
(d) A 95% confidence interval for (pā„40K ā p<40K) is (-0.02, 0.16).
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Government shutdown. The United States federal government shutdown of 2018ā2019 occurred from Decemb...
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