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A lending firm knows a financial application takes on average 12.8 minutes and has a standard deviation of 2.1 minutes. A project manager thinks that since he works with farmers the application will take longer to complete. He took a sample of 36 completed applications and found the average time was 13.4 minutes. The sample data is normally distributed. Use α = 0.05. Is he correct in his assumption?
Conduct a full hypothesis test for this problem.
a fast-food restaurant sells hamburgers and chicken sandwiches. on a typical weekday the demand for hamburgers is
As part of a curriculum review, the psychology department would like to select a simple random sample of 20 of last year's 140 graduates to obtain information on how graduates perceived the value of the curriculum. Describe two different methods t..
Show that for any metric space S, if A ⊂ S and x ∈ A\ A, then there is a bounded, continuous real-valued function on A which cannot be extended to a function continuous on A∪{x }. Hint: f (t ) := sin(1/t ) for t > 0 cannot be extended continuously..
What would you recommend to Mary Smith, and why - Mary Smith is the Manager of Market Intelligence for Acme Automotive Accessories (AAA) Corporation, a $500 million manufacturing company traded on the NYSE.
a box is to be constructed so that its height is five inches and its base is y inches by y inches where y is a random
Before 1918, in a random sample of 11 wolves spotted in the region, what is the probability that 8 or more were male?
Two new york designs are under consideration for possible adoption in an assembly plant. A time study is conducted with 10 workers using design 1, and 12 workers using design 2. The means and standard deviation of their assembly times in minutes a..
explain the process of the transmembrane process tmp that is the pressure difference between the blood side and the
Historical data suggests a standard deviation in the first sample of 10 and a standard deviation in the second sample of 16. Find a 95% confidence interval for the population difference.
How many cars must be randomly selected and tested in order to estimate the mean braking distance of registered cars in the US to give a 99% confidence that the sample mean is within 2 ft of the population means. The population standard deviat..
Perform appropriate tests to con?rm or refute the hypothesis that the true population mean number of accidents in the ?rst period is 6, while the same popu- lation parameter was halved in the second period.
A IRS auditor randomly selects 3 tax returns from 48 returns of which 9 contain errors. What is the probability that she selects none of those containing errors? Round to four decimal places.
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