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A random variable Y has unknown mean µ and standard deviation 20. What is the sample size n needed so that the 99% margin of sampling error is 5?
Statistics and Probability, Statistics
A student must answer 6 multiple choice questions for a test, but the student did not study well. There are 6 answers per question, but only one is correct. If the student randomly guesses on each questions, what is the ...
Are the outcomes of hospital care different on weekends than weekdays? In a random sample of 500 patients who experienced severe medical complications after admission to acute care wards in three U.S. states from 1999 an ...
Leibniz sells you an annuity that pays $1,500 every month from the end of September 2018 to the end of August 2022 with annual interest rate 7% compounded monthly. (round off all answers to two decimal places) (a) What i ...
Suppose a soccer team wins each of its games with probability 0.4, loses with probability 0.4, and ties with probability 0.2, with each game's outcome independent. Their season starts, and they play a game every day.Let ...
A recent college graduate has taken a new job at Work LLC, and since the company does not offer a traditional pension plan, she plans to take advantage of a tax-free investment account backed by a reputable financial ins ...
According to a study in a previous year, 57.0% of households nationwide used natural gas for heating during a year. Recently, a survey of 2,700 randomly selected households showed that 58.0% used natural gas. Use a 0.05 ...
How do you find the minimum sample size when population standard deviation is anywhere between 14 to 24, and the half-width B desired could be anywhere between 2 to 7?
In a survey of 400 adults that say traffic is a problem: East reported 36% is a problem, South 33% problem, Midwest 26% problem and West 55% problem. (a) The 95% confidence interval for the proportion from the West say t ...
Identify and describe the six types of e-commerce. Give an example for each one.
If I had to collect and assess the quality and appropriateness of data held by a large, multi-national organization. What steps should I take? How would I address network, security, and ethical considerations when decidi ...
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Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate
Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p
Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As
Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int
Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As