Group mean centring is a useful way to prevent multicollinearity, but how is it usually calculated?
A. An individual score (player confidence) is subtracted from a group mean (mean player confidence in that group).
B. An individual score (player confidence) is multiplied by the group mean (mean player confidence in that group).
C. An individual score (player confidence) is added to a group mean (mean player confidence in that group).
D. An individual score (player confidence) is divided by a group mean (mean player confidence in that group).
Answer: A
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