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Use the practical rule of deviations, if the Mean is 60 and the Standard Deviation of...

Use the practical rule of deviations, if the Mean is 60 and the Standard Deviation of 4.9. (Average + S, Medium - S, Medium + 2S, Medium - 2S, Medium + 3S, Medium - 3S).

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TOPIC:Explaining the practical rule of deviations using the Empirical law of bell-shaped distribution.

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