What is the value in calculating the Standard Deviation of a QT If there are two different populations, and they have

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answerhappygod
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What is the value in calculating the Standard Deviation of a QT If there are two different populations, and they have

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What is the value in calculating the Standard Deviation of aQT If there are two different populations, and they have thesame mean, is it true to say that the shape of the curve is thesame ? What is the importance of the value of the Mean +_1 SD in measuring a QT?
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