Reference no: EM131021391
1 A study of academic dishonesty among college students used a two-stage sampling design.
The first stage chose a sample of 30 college and universities. Then the study authors mailed questionnaires to a stratified sample of 200 seniors, 100 juniors, and 100 sophomores at each school. One of the schools chosen has 1127 freshmen, 989 sophomores, 943 juniors, and 895 seniors. You have alphabetical lists of the students in each class. Explain how you would assign labels for stratified sampling. Then use table B, starting at line 122, to select the first 5 students in the sample from each stratum. After selecting 5 students for a stratum, continue to select the students for the next stratum.
2. To gather data on 1200-acre pine forest in Louisiana, the U.S. Forest Services laid a grid of 1410 equally spaced circular plots over a map of the forest. A ground survey visited a sample of 10% of these plots. How would you label the plots? Choose the first 5 plots in an SRS of 141 plots. (If you use Table B, start at line 105)
3. A study of 12,000 abled-bodied male students at the University of Illinois found that their
times for the miles run were approximately Normal with mean 7.11 minutes and standard deviation 0.74 minute. Choose a student at random from this group and call his time for the mile Y. What is the probability P(Y ≥ 8) = ? Write the event "the student could run a mile in less than 6 minutes"in terms of values of the random variable Y. What is the probability of this event?
4. A test of H0 : p = 0.5 against Ha : p > 0.5 has a test statistic z = 1.876.
Is this test significant at the 5% level (α = 0.05)? Explain why or why not and draw a graph.
Is it significant at the 1% level (α = 0.01)? Explain why or why not and draw a graph
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Explained what advice you would give to frank and sarah
: They wonder, Is a feeding tube equivalent to a breathing machine? Would it be possible to allow Ann to lie there and die of starvation? Is that murder? What would she want? What is the right thing to do? (Burkhardt & Nathaniel, 2008).
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Determining the demand-supply analysis
: An industry's supply and demand curves are given by the following equations: QD = 2000 - 4P and QS = 6P
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Find the optimal risky portfolio
: Find the optimal risky portfolio and its expected return and standard deviation - How much an investor with A = 5 will invest in the optimal risky portfolio
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What does author mean by market failures
: Such "market failures" provide a justification for private conservation efforts and public land use planning and regulation. What does the author mean by market failures and inefficient land allocation? Explain why the author describes inefficient..
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Two-stage sampling design
: 1 A study of academic dishonesty among college students used a two-stage sampling design.
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What has happened to the efficient level of output
: Experts are divided about whether fracking results in significant pollution, but some people worry that chemicals used in fracking might lead to pollution of underground supplies of water used by households and farms. First, assume that fracking c..
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Pearson product-moment correlation
: Compute the Pearson product-moment correlation coefficient to determine the strength of the correlation between these two variables. Comment on the strength and direction of the correlation.
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What is the quantity of textbooks demanded domestically
: Given the above information what is the quantity of textbooks demanded domestically when this market opens to trade? What is the quantity of textbooks produced domestically when this market opens to trade? Given the above information will Zipia im..
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What type of externality arises from studying
: Earning more will enable them to spend more on their future families for things such as orthodontia, nice clothes, admission to expensive colleges, and travel. Tom thinks about the potential benefits to his potential children when he decides how ..
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