Which of the following items would be a legitimate use of the prediction equation?
a. To estimate the total variance in an unknown independent variable.
b. To estimate the shared variance for the independent and dependent variables.
c. Inserting an unobserved value of the independent variable into the equation and then using it to predict the value of the dependent variable.
d. To extrapolate beyond the observed data limits of the observed independent variable.
Ans: C
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