xhallie
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So I took probability last year, and for one of my classes we have an optional refresher worksheet, but I cannot remember how to deal with random variables :(
I don't need the answer -- just some guidance on what formulas to use please!
x is a random variable with mean 5 and variance 12.
y = 3 + 9x
a) what is the expected valued of y?
b) what is the variance and SD of y?
c) is y normally distributed?
thank you so much!
I don't need the answer -- just some guidance on what formulas to use please!
x is a random variable with mean 5 and variance 12.
y = 3 + 9x
a) what is the expected valued of y?
b) what is the variance and SD of y?
c) is y normally distributed?
thank you so much!
