Question

Suppose that you are given the following results. Find the correlation coefficient of the data. sx = 2.391, sy = 13.200, b = -4.780

a) 0.155

b) -0.866

c) -0.433

d) -0.155

e) 0.866

f) None of the above

Suppose you find that the correlation coefficient for a set of data is 0.841. What is the coefficient of determination and what does it mean?

a) 0.841; This means that 84.1% of the variation of y is explained by the LSRL of y on x.

b) 0.841; This means that we are 84.1% accurate with our prediction of the LSRL equation.

c) 0.707; This means that 70.7% of the variation of y is explained by the LSRL of y on x.

d) 0.707; This means that we are 70.7% accurate with our prediction of the LSRL equation.

e) None of the above

Answer 1