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Standardized Z-score

How does a researcher determine the meaning of a score on a norm-referenced test such as an IQ test?
Why are raw scores transformed to standardized scores, such as z-scores, in order to interpret those raw scores?
How do these standardized scores help researchers to compare the scores on two different tests with different means and standard deviations? .

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Solution Summary

How does standardizing help when comparing two scores? This solution explores this question. The solution is provided in a Word document which is attached.