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October 21, 2025, 05:12:03 pm
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Author Topic: Help!  (Read 568 times)  Share 

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smithy16

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Help!
« on: October 28, 2011, 10:19:07 am »
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Does anyone know how to find the standard deviation of a data set using the 68-95-99.7% rule?
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iroflmfao

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Re: Help!
« Reply #1 on: October 28, 2011, 11:09:49 am »
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If its norm distributed, which it is. Just divide the range by 6.

Since the normal distributed is divide into 6 equal standard deviations.
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MJRomeo81

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Re: Help!
« Reply #2 on: October 28, 2011, 04:36:34 pm »
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I may be wrong but I always thought it was divide by four for an 'estimate'?
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iroflmfao

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Re: Help!
« Reply #3 on: October 29, 2011, 10:25:39 am »
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Yes i know what you mean, in the book it says 4.

I had a heated argument with my teacher about this also.

I think we concluded if its a norm distribution we divide by 6. Since it makes sense.

And even its any other data divide by 4 as an estimate.
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