Sided die is rolled twice
A 8-sided die is rolled twice. Let X be the sum of the two rolls, Y be the first minus the second, and Z be the 4 times the first, minus the second.
(a) Compute Cov(X,Y):
Cov(X,Y)=
(b) Compute Cov(X,Z):
Cov(X,Z)=
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If the number of people entering an elevator on the ground floor is a Poisson random variable with mean 12, and if each person is equally likely to get off at any floor, independently of the others, compute the expected number of stops that the el
It is reasonable to model the number of winter storms in a season as with a Poisson random variable. Suppose that in a good year the average number of storms is 5, and that in a bad year the average is 6.
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A population has a mean 72 and standard deviation 12. Find the mean and standard deviation of a sampling distribution of a sample means with sample size n 36.
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