Which of the following statements are false a Coefficient of

Which of the following statements are false?

a) Coefficient of correlation is also known as the coefficient of determination

b) Coefficient of correlation has no units

c) Coefficient of correlation is not affected by outliers

d) Calculation of coefficient of correlation requires that both the dependent and the independent variables be quatitative

e) none of the above

Solution

a) Coefficient of correlation is also known as the coefficient of determination [ no, coefficient of determination is the squared term of corelation coefficient ]

c) Coefficient of correlation is not affected by outliers [ no, because , r = cov(x,y) / ( s.d(x) * s.d(y) and s.d\'s do get effected by inclusion of a outlier ]