Question

Let x and y be two correlated random variables with means x and y , respectively. The mean of the random variable x +y is always

Answer 1

(x+y)/2

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Answer 2

The correlation coefficient of the linear relationship between the variables x and y. xi – the values of the x-variable in a sample. x – the mean of the values of the x-variable. ... ȳ – the mean of the values of the y-variable.