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The coefficient of correlation between t...

The coefficient of correlation between the values denoted by X and Y is `0.5`. The mean of X is 3 and that of Y is 5. Their standard deviations are 5 and 4 respectively. Find
(i) the two lines of regression.
(ii) the expected value of Y, when X is given 14
(iii) the expected value of when Y is given 9

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