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The flashlight batteries produced by Manufacturer X are known to have a mean life of 60 hours, with a standard deviation of 4 hours. At least what percentage of flashlights will have a life of 54 to 66 hours?
Statistics and Probability, Statistics
A researcher records the sound (in decibels) during a series of lessons taught by a substitute teacher at a local elementary school. In his study, he found that the sound was 20±2 (M±SD) decibels. Assuming the data are n ...
Bella is 23 years old and wants to invest money for her retirement. She wants to have $2,000,000 saved up when she retires at age 65. a) If she can earn 10% per year in an equity mutual fund, calculate the amount of mone ...
A student is gathering data on the driving experiences of other college students. One of the variables measured is the type of car the student drives. These data are coded using the following method: 1 = subcompact, 2 = ...
A study discovered that Americans consumed an average of 10.7 pounds of chocolate per year. Assume that the annual chocolate consumption follows the normal distribution with a standard deviation of 3.1 pounds. Complete p ...
What is the theory behind callable bonds and when are they most likely to be called?
A researcher wants to determine if lead levels are different between the top of a glass of water and the bottom of a glass of water. Many samples of water are taken. From half, the lead level at the top is measured and f ...
Thanks for starting our discussion on Cash Management. If you think about it this comes down to speeding up collections of cash or slowing down disbursements of cash. Point out some strategies to accomplish it? Give refe ...
The shareholders of a company need to elect six directors and there are 150,000 shares outstanding. 1). What is the minimum number of shares they need to own to make sure that they can elect at least one director if the ...
The board of a major credit card company requires that the mean wait time for customers when they call customer service is at most 3.00 minutes. To make sure that the mean wait is not exceeding the requirement, an assist ...
Assume the random variable x is normally distributed with a mean u=80 and a standard deviation o=4. Find the indicated probability. P(69 P(69 Round to four decimals places as needed.
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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