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Question: A financial analyst is interested in estimating the average amount of a foreign loan by U.S. banks. The analyst believes that the amount of a loan may be different depending on the bank, or, more precisely, on the extent of the bank's involvement in foreign loans. The analyst obtains the following data on the percentage of profits of U.S. banks from loans to Mexico and proposes to use these data in the construction of stratum weights. The strata are the different banks: First Chicago, 33%; Manufacturers Hanover, 27%; Bankers Trust, 21%; Chemical Bank, 19%; Wells Fargo Bank, 19%; Citicorp, 16%; Mellon Bank, 16%; Chase Manhattan, 15%; Morgan Guarantee Trust, 9%.
a. Construct the stratum weights for proportional allocation.
b. Discuss two possible problems with this study.
Find a 95% confidence interval for the mean amount spent by patients at the pharmacy. Show your calculations and/or explain the process used to obtain the interval.
a sample of n 25 individuals is selected from a population with fx 80 and a treatment is administered to the sample.
Develop a minimum cost schedule for the part-time employees. (How many start at each hour?). What is the total payroll for the part-time employees?
STAT11048 (T1, 2016) - Assessment. In a mathematics test, a random sample of 2025 sixth graders had a mean score of 68.1 and a standard deviation of 9. Calculate the 95% confidence interval for the population mean
It is well known that the mean resting heart rate of adults is 71 beats/minute.- At α = .05, is there sufficient evidence to indicate that the true mean heart rate during laughter exceeds 71 beats/minute?
A company's internal accounting standards are set to ensure that no more than 5% of the accounts are in error. From time to time, the company collects a random.
In what way do researchers take a risk if they do not pilot test the independent variable they plan to use in an experiment?
If we assume that the download times are normally distributed, what percent of users will wait between 5 and 10 seconds for the homepage to download?
Assume the reliability of a product is given by an exponential distribution with a mean of 1 year. How long would it take to achieve a 10% failure rate?
Fast Service Truck Lines uses the Ford Super Duty F-750 exclusively. Management made a study of the maintenance costs and determined the number of miles traveled during the year followed the normal distribution.
Educated mothers. The National Center for Education Statistics monitors many aspects of elementary and secondary education nationwide.
Determine the cost of providing care - How would you measure the cotinine level in the body? Explain the result.
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