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USA Today conducted a survey asking readers, "What is the most hilarious thing that has ever happened to you en route to or during a business trip?"
a. What kind of sampling method is this?
b. Are the results likely to be biased? Explain.
Statistics and Probability, Statistics
A clinical psychologist is the primary therapist for 18 patients. She randomly selects a sample of 3 patients to be in her study. How many different samples of this size can be selected from this population of 18 patient ...
1) Suppose a? seven-year, $1,000 bond with a 7.9% coupon rate and semiannual coupons is trading with a yield to maturity of 6.66 % i. Is this bond currently trading at a? discount, at? par, or at a? premium? Explain. ? ...
Can anyone tell me how the margin of error and the level of confidence are related to one another in statistics?
The monthly sales demand for a new product is uncertain, but it is considered to be adequately described by a normal random variable with mean 50,000 units and variance 100,000,000. (a) A factory to manufacture the new p ...
There is a new treatment for smokers to stop smoking. In an experiment, 85% of 300 smokers quit after 10 days of the treatment. What is the reasonable range for the success rate p of our new treatment? Which is the 95% c ...
A survey found that people keep their televisions an average of 5.8 years. The standard deviation is 0.76 year. If a person decides to buy a new TV, find the probability that he or she owned the old one for the given amo ...
One sample has n = 8 and SS = 21 and a second sample has n = 8 and SS = 35. What is the pooled variance for the two samples?
A researcher determines that students study an average of 60 15 (M SD) minutes per week. Assuming these data are normally distributed, what is the z score for students studying 45 minutes per week?
A book company sells 10, 000 books a month, each book has a 1/500 chance of being returned. Us the Poisson approximation to find the probability that the number of books returned in a month will be at most 3.
One study, based on responses from 1, 013 randomly selected teenagers, concluded that 43% of teenagers cite grades that their greatest source of pressure. Use a 0.05 significance level to test the claim that fewer than h ...
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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