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On Friday, Wall Street traders were anxiously awaiting the federal government's release of numbers on the January increase in nonfarm payrolls. The early consensus estimate among economists was for a growth of 250,000 new jobs (CNBC, February 3, 2006). However, a sample of 20 economists taken Thursday afternoon provided a sample mean of 266,000 with a sample standard deviation of 24,000. Financial analysts often call such a sample mean, based on late-breaking news, the whisper number. Treat the "consensus estimate" as the population mean. Conduct a hypothesis test to determine whether the whisper number justifies a conclusion of a statistically significant increase in the consensus estimate of economists. Use a = .01 as the level of significance.
What is the formula for the exclusive range?
Describe the purpose of the link function of a GLM. What is the identity link? Explain why it is not often used with binomial and Poisson responses.
A random sample of 4000 U.S. citizens yielded 2190 who are in favor of gun control legislation. Find the point estimate for estimating the proportion of all Americans who are in favor of gun control legislation.
Find the P-value that would be used to determine if the percentage of customers who prefer mint chocolate chip ice has increased at a 5% level of significance.
She concluded that encouraging teachers to be properly attired will increase academic performance. Do you agree or disagree with her conclusion? Support your answer.
What are the strengths and weaknesses of nonparametric tests? Can the outcomes of the nonparametric tests be generalized to populations?
part iyou have been asked for assistance regarding the type of surveys that should be used in five research situations.
What is probability of selecting 2 families neither had taxes prepared by H&R Block?
You're the production manager for operation that produces circuit boards. Each board is tested at the end of manufacturing process. Rejected boards are discarded and have no future value.
Find out a linear equation in the form P = mt + b (y = mx + b) that gives the population, P, t years from 2010.
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (2) One or the other ..
SAT I scores around the nation tend to have a mean scale score around 500, a standard deviation of about 100 points and are approximately normally distributed. A person who scores (a perfect) 800 on the SAT I has approximately what percentile rank..
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