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If n independent random variales, Xi, have normal distributions with means mu(i) and standard deviations, sigma(i), find the moment generating function of their sum and identify the corresponding distribution, its mean and its variance.
Statistics and Probability, Statistics
Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. Find the probability that a randomly selected bill will have an amount greater than $165, which the city believes might indicate t ...
If a study was done to measure the total brain volume of patients that had schizophrenia and also of patients that are normal. Table 1 has the total brain volume of the normal patients and table 2 has the total brain vol ...
Is it possible to have no (or very small) collinearity and correlation between variables, yet have the same R squared and Adjusted R squared values?
Describe the steps you took. There are 652 males, 396 say they have been to dentist in past year. Give a confidence interval for 90% of the population proportion .
How does a histogram help us know the probability of getting a certain value for a variable? In other words how does the histogram relate to probability?
A perpetuity pays $4300 at the end of every month for 11 months of each year. At the end of the 12th month of each year, it pays double that amount. If the effective ANNUAL rate is 9%, what is the present value of this p ...
1) Prince George's County Public Schools wants to access the effectiveness of its new 1st grade reading program. Ten 1st grade classrooms are randomly selected from across the county. What kind of sampling method is bein ...
A bottle of water is supposed to have 20 ounces. The bottling company has determined that 98% of bottles have the correct amount. Which of the following describes a binomial experiment that would determine the probabilit ...
A food safety guideline is that the mercury in fish should be below 1 part per million? (ppm). Listed below are the amounts of mercury? (ppm) found in tuna sushi sampled at different stores in a major city. Construct a 9 ...
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 ...
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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