Hi i was just wondering if the following was correct

Attachment 9921

Given X and Y, Z has the mean and Variance

Mean: 15

Variance:25

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- January 31st 2009, 04:12 AM1234567Normal distribution- cheak for mean and variance
Hi i was just wondering if the following was correct

Attachment 9921

Given X and Y, Z has the mean and Variance

Mean: 15

Variance:25 - January 31st 2009, 12:37 PMmr fantastic
- February 2nd 2009, 04:23 AManon18
can i ask how you got the mean and variance for Z

- February 2nd 2009, 04:50 AMmr fantastic
- February 2nd 2009, 04:55 AManon18
thanks...so how would you work out the correlation between X and Z and between Y and Z.

using correlation(X,Z)=cov(X,Z)/sqrt[var(x)var(Z)]

how would you work out the cov(X,Z)