When there is no linear relationship between X and Y,the z scores on X will bear no consistent relationship to the z scores on Y,either in size or sign.

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This is because z-scores are calculated based on the mean and standard deviation of the data. If there is no linear relationship between X and Y, then their means and standard deviations will be independent of each other, which means z-scores on X will bear no consistent relationship to the z-scores on Y.

When There Is No Linear Relationship Between X and Y,the