On a nationwide math test, the mean was 54 and the standard
deviation was 7. If Roberto scored 70, what was his z-score?
On a nationwide math test, the mean was 54 and the standard deviation was 7. If Roberto scored 70, what was his z-score?
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On a nationwide math test, the mean was 54 and the standard deviation was 7. If Roberto scored 70, what was his z-score?
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