1 The correlation coefficient is equal to A the total variat

1) The correlation coefficient is equal to: A) the total variation B)the unexplained variation C)one minus the proportion of unexpalined variation\\ D)the square root of the explained variation

Solution

Correlation coefficient : is a value between -1 and 1

it tells us about the relation between the two variables

a value of -1 means perfect negative correlation

a vlaue of +1 means perfect positive correlation

a value of 0 means no correlation

this tells us about how much Y (dependent variable) changes , due to change is X (indpendent variable)

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R square is called coefficient of determination. It tells about how much variation in Y is explained by X

R square is basically the square of correlation coefficent R

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Thus the coefficient correlation can also be defined that it is the square root of the explained variation