Mathematics, 07.10.2019 16:30 he0gaubong
Suppose that x is a random variable with mean 30 and standard deviation 4. also suppose that y is a random variable with mean 50 and standard deviation of 8. assume that the correlation between x and y is zero. find the variance and the standard deviation of the random variable z for each of the following cases. show work.
(a) z = 35 -10x
(b)z = 12x - 5
(c) z = x +y
(d) z = x -y
(e) z = -2x + 2y
Answers: 2
Mathematics, 21.06.2019 12:50
Nnnnneeedd 1.find the residual if you know the actual number is 5.2 and the predicted value is 4.8
Answers: 3
Mathematics, 21.06.2019 15:50
(08.01)consider the following pair of equations: x + y = −2 y = 2x + 10 if the two equations are graphed, at what point do the lines representing the two equations intersect? (−4, 2) (4, 2) (−2, 4) (2, 4)
Answers: 2
Mathematics, 21.06.2019 20:50
An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.
Answers: 3
Mathematics, 22.06.2019 01:00
What is the slope of the line? a. -5/2 b.2/5 c. 5/2 d.7/2
Answers: 1
Suppose that x is a random variable with mean 30 and standard deviation 4. also suppose that y is a...
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