Suppose for the three variables, GPA (X1) , time spent on watching TV (X2) , and IQ (X3) , the bivariate correlation coefficients are computed as below:
R12 = -0.4; r13 = 0.6; r23 = 0.
If we remove the influence of IQ from GPA, the correlation of GPA and the time spent on watching TV will be
A) stronger than the bivariate correlation r12.
B) weaker than the bivariate correlation r12.
C) the same as the bivariate correlation r12.
D) uncertain.
Correct Answer:
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