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Given independent random variables, X and Y, with means and standard deviations as shown, find the mean
Given independent random variables, X and Y, with means and standard deviations as shown, find the mean and standard deviation of each of the variables in parts a to d.
mean | SD | |
X | 100 | 13 |
Y | 15 | 3 |
a. 5X
b. Y + 3
c. X + Y
d. X - Y