39 Which of the following statements is false a Coefficient

39. Which of the following statements is 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 independent

variables be quantitative

e. None of the above

40. Figure 3 above shows various relationships between variables x and y. The four correlation coefficients (in no particular order) for the four relationships are: -1, 0, 0.5, and 1. Which of these four graphs most likely corresponds to a correlation coefficient of 0.5?

a. Graph A

b. Graph B

c. Graph C

d. Graph D

Solution

Q38.
c. Measures the change in Y when X increases by 1 Unit

Y = a + b x is the equation based on Y on X

Q39.
a. Coefficient of correlation is also known as the coefficient of determination

coefficient of determination= r^2

Q40.
correlation coefficient of 0.5, is moderately positively correlation coefficient.

b. Graph B