Homework Answers
The statistic software output for this problem is:
Z observed = 4.47
P-value = 0.0000
Critical value = 2.05
higher than
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8th-ed Chapter 09, Section 9.4, Problem 087 According to the U.S. Census Bureau, 11% of children...
--- According to the U.S. Census Bureau, 11% of children in the United States lived with...
--- According to the U.S. Census Bureau, 11% of children in the United States lived with at least one grandparent in 2009 (USA TODAY, June 30, 2011). Suppose that in a recent sample of 1570 children, 236 were found to be living with at least one grandparent. At a 2.5% significance level, can you conclude that the proportion of all children in the United States who currently live with at least one grandparent is higher than 11%? Use both the...
According to the U.S. Census Bureau, 11% of children in the United States lived with at...
According to the U.S. Census Bureau, 11% of children in the United States lived with at least one grandparent in 2009 (USA TODAY, June 30, 2011). Suppose that in a recent sample of 1560 children, 249 were found to be living with at least one grandparent. At a 1% significance level, can you conclude that the proportion of all children in the United States who currently live with at least one grandparent is higher than 11%? Use both the p-value...
Question 11 (12 points) According to the U.S. Census Bureau, the population of the United States...
Question 11 (12 points) According to the U.S. Census Bureau, the population of the United States in 2008 was 304 million people. In addition, the population of the United States was growing at a rate of 1.1% per year. Assuming this growth rate is continues, the model P(t) = 304(1.011)' 2009 represents the population P (in millions of people) in year t. According to the model, when will the population be 453 million people? Year Be sure to round your...
(COMPUTE AND INTERPRET CONFIDENCE INTERVAL ESTIMATES) . According to the U.S. Census Bureau, 43% of men...
(COMPUTE AND INTERPRET CONFIDENCE INTERVAL ESTIMATES) . According to the U.S. Census Bureau, 43% of men who worked at home were college graduates. In a sample of 500 women who worked at home, 162 were college graduates. Construct a 98% confidence interval for the proportion of women who work at home who are college graduates. Find the critical values, find E , the margin of error, then compute a nd interpret your interval estimate with a full sentence. Critical value:...
The U.S. Census Bureau computed the proportion of U.S residents who live in each of the...
The U.S. Census Bureau computed the proportion of U.S residents who live in each of the four geographic regions in 2010. Then a simple random sample was drawn of 1000 people living in the U.S. in 2018. The following table presents the results: Region 2010 Proportion 2018 Frequency Northeast 0.179 173 Midwest 0.217 205 South 0.371 384 West 0.233 238 Determine whether the proportions of people living in the U.S. in the various regions has changed between 2010 and 2018....
According to the U.S. Census Bureau, in 2016 33.4% of the adult population in the U.S....
According to the U.S. Census Bureau, in 2016 33.4% of the adult population in the U.S. had received at least a bachelor's degree. Suppose that a start-up high-tech firm wishes to locate its headquarters in a city that meets several criteria, one of which is that the proportion of adult residents who have received at least a bachelor's degree in the city is higher than it is nationally. A particular city meets all criteria, except that it is not known...
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age...
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote. Suppose that 700 employed persons and 300 unemployed persons are independently and randomly selected and that 500 of the employed persons and 200 of the unemployed persons have registered to vote. Can we conclude that the percentage of the employed workers (p1), who have registered to vote, exceeds the percentage of unemployed workers (p2), who have registered to...
The Statistical Abstract of the United States published by the U.S. Census Bureau reports that the...
The Statistical Abstract of the United States published by the U.S. Census Bureau reports that the average annual consumption of fresh fruit per person is 99.9 pounds. The standard deviation of fresh fruit consumption is about 30 pounds. Suppose a researcher took a random sample of 38 people and had them keep a record of the fresh fruit they ate for one year. Appendix A Statistical Tables (Round all z values to 2 decimal places. Round your answers to 4...
showing work would be helpful! thank you According to a book published in 2011, 45% of...
showing work would be helpful! thank you
According to a book published in 2011, 45% of the undergraduate students in the United States show almost no gain in learning in their first two years of college (Richard Arum et al., Academically Adrift, University of Chicago Press, Chicago, 2011). A recent sample of 1490 undergraduate students showed that this percentage is 31%. Can you reject the null hypothesis at a 5% significance level in favor of the alternative that the percentage...
According to a book published in 2011, 45% of the undergraduate students in the United States...
According to a book published in 2011, 45% of the undergraduate students in the United States show almost no gain in learning in their first two years of college (Richard Arum et al., Academically Adrift, University of Chicago Press, Chicago, 2011). A recent sample of 1450 undergraduate students showed that this percentage is 33%. Can you reject the null hypothesis at a 5% significance level in favor of the alternative that the percentage of undergraduate students in the United States...
--- According to the U.S. Census Bureau, 11% of children in the United States lived with at least one grandparent in 2009 (USA TODAY, June 30, 2011). Suppose that in a recent sample of 1570 children, 236 were found to be living with at least one grandparent. At a 2.5% significance level, can you conclude that the proportion of all children in the United States who currently live with at least one grandparent is higher than 11%? Use both the...
Question 11 (12 points) According to the U.S. Census Bureau, the population of the United States in 2008 was 304 million people. In addition, the population of the United States was growing at a rate of 1.1% per year. Assuming this growth rate is continues, the model P(t) = 304(1.011)' 2009 represents the population P (in millions of people) in year t. According to the model, when will the population be 453 million people? Year Be sure to round your...
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote. Suppose that 700 employed persons and 300 unemployed persons are independently and randomly selected and that 500 of the employed persons and 200 of the unemployed persons have registered to vote. Can we conclude that the percentage of the employed workers (p1), who have registered to vote, exceeds the percentage of unemployed workers (p2), who have registered to...
showing work would be helpful! thank you
According to a book published in 2011, 45% of the undergraduate students in the United States show almost no gain in learning in their first two years of college (Richard Arum et al., Academically Adrift, University of Chicago Press, Chicago, 2011). A recent sample of 1490 undergraduate students showed that this percentage is 31%. Can you reject the null hypothesis at a 5% significance level in favor of the alternative that the percentage...
According to a book published in 2011, 45% of the undergraduate students in the United States show almost no gain in learning in their first two years of college (Richard Arum et al., Academically Adrift, University of Chicago Press, Chicago, 2011). A recent sample of 1450 undergraduate students showed that this percentage is 33%. Can you reject the null hypothesis at a 5% significance level in favor of the alternative that the percentage of undergraduate students in the United States...
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