Q1) Which is not true of coefficient of determination?

a) It is square of correlation coefficient.

b) It is based on sum of squares (SSR, SSE and SST).

c) It reports percent of variation in Y which is explained by X.

d) It is negative when there is inverse relationship between Y and X.

Q2) Assume that SSE = 84 and SST= 442.12. Given this information, coefficient of determination is

a) 0.77

b) 0.81

c) 0.23

d) 0.75

Q3) True or False? Bivariate correlation coefficient always has same sign as b₁ in Y = b₀ + b₁X

a) True

b) False

Q4) Compute sample correlation coefficient using data below.