Statistic/Psychology
posted by Crystal .
In using repression to predict an individuals performance on the criterion based on his or her score on the instrument, the prediction is least accurate when the correlation is:
a.1.00
b. 0.00
c 0.50
d. 1.00

Correlation coefficients range from 1 to +1 where the two extremes enable the researcher to make almost perfect "predictions".
On the other hand, the closer the correlation coefficient approaches zero, the less reliable would be the indication of the regression line.
Can you make a choice based on the above information? 
So would the correlation be 0.00

Exactly!