On a nationwide math test, the mean was 69 and the standard deviation was 4. If Roberto scored 80, what was his z-score?

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answerhappygod
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On a nationwide math test, the mean was 69 and the standard deviation was 4. If Roberto scored 80, what was his z-score?

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On a nationwide math test, the mean was 69 and the standarddeviation was 4. If Roberto scored 80, what was his z-score?
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