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On a nationwide math test, the mean was 70 and the standard deviation was 7. If Roberto scored 75, what was his z-score? Use the

On a nationwide math test, the mean was 70 and the standard deviation was 7. If Roberto scored 75, what was his z-score? Use the formula Z=x where is the mean,is the standard deviation, and x is Roberto's score. Round to 4 decimal places.

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