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Square the standard deviations, subtract/add them and calculate the square root of the subtraction/sum.

StDV=sqrt (StDvA^2+StDvB^2)

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12y ago
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Q: How do you subtract standard deviations?
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Related questions

How many standard deviations is 16.50 from the mean?

How many standard deviations is 16.50 from the mean?


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