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Show that the sample variance is equal to [n SUM1(Yi2) - (SUMi Yi)2] / [n(n-1)]. (This is a fairly quick way to calculate S2 since it doesn't detour through the mean.)
Statistics and Probability, Statistics
Looking for guidance: A distribution of exam scores has μ = 90 and σ = 10. In this distribution, Sharon's score is 9 points above the mean, Jill has a z-score of +1.20, Steve's score is ½ standard deviation above the mea ...
Please help with the below questions: Based on the following project assumptions, determine the NPV and the IRR for the project. Equipment invoice $300,000 Transportation and installation $ 85,000 Training $ 20,000 Proje ...
Now assume that I am talking about a normally distributed set of data: An IQ test. This IQ test has a mean of 100 and a standard deviation of 15. Find the following probabilities What is the probability that someone scor ...
The computer systems department has 8 faculty, 6 are tenured. A committee is formed of 3 faculty members. If members are submitted at random: - What is the probability all members of the committee are tenured? - What is ...
The number of cell phones per 100 residents in countries in Europe is given in table 9.3.9 for the year 2010. The number of cell phones per 100 residents in countries of the Americas is given in table 9.3.10 also for the ...
In a fish tank, there are 23 goldfish, 4 angelfish, and 9 guppies. If a fish is selected at random, find the probability that it is an angelfish or a guppy.?
The speed of cars on a stretch of road is normally distributed with an average 42 miles per hour with a standard deviation of 5.9 miles per hour. What is the probability that a randomly selected car is violating the spee ...
Question: In the example of the diamond in the cave, what would be efficient law if any one explorer had only a very small probability of finding the diamond? How would your answer change if the costs of exploration were ...
Suppose that systolic blood pressure for 35- to 44-year-olds is normally distributed with mean 125 in mm Hg and standard deviation 10 in mm Hg. What proportion of individuals will have a blood pressure reading between 12 ...
Becky Fenton has 40/80/35 automobile insurance coverage. If two other people are awarded $70,000 each for injuries in an auto accident in which Becky was judged at fault, how much of this judgment would the insurance cov ...
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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
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Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int
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