Re: Underestimated stats


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Re: Underestimated stats



Hint: if the units are inches, so that the data is
6 in, 7 in, etc. What are the units of 1.66 ?

--
Bob Wheeler --- (Reply to: bwheeler@echip.com)
        ECHIP, Inc.

John C wrote:
>
> I have a question.
>
> Why does the TI-83 under estimate the standard dev. for a short list of
> numbers such as: 6, 7, 8, 9,?
>
> I get a sample dev. of 1.29, and a pop. dev. of 1.12, but hand calculated
> the sample dev. is 1.66.
>
> How can I improve the accuracy of the TI-83 when calculating stats.?
>
> Thanks,
> John


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