Coefficient of correlation between the ages of brothers and sisters in a community was found to be 0.8. Average age of the brothers was 25 and that of sisters 22 years. Their standard deviations were 4 and 5 respectively. Find: a. The expected age of the brother when sister’s age is 12 years. (Answer: 18.6 years) be. The expected age of the sister when brother’s age is 33 years. (Answer: 30 years) (The Regression Equations are: X = 0.64X + 10.9 2 and Y = X – 3)
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0 is answer
because you multiply it with 0 at last
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