Oh boy Gary, you got's me minds twisted....
Sam...
----- Original Message -----
From: "Gary Reese" <pcacala@xxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Saturday, February 17, 2001 12:12 PM
Subject: Re: [OM] OM-PC Value Question
> Chris writes:
>
> << I do NOT capture each and every e-Bay auction, so when you're looking
> at the data consider it only a representative sample. >>
>
> Subtle, but highly important point for anyone analyzing the information.
> But it is only "representative" if the sample was obtained in a random
> manner. If there is a pattern to what is excluded, then the information
> is no longer "representative." Example: "skipped some days in December
> because there were too many listings to handle" = missed a chuck of data
> from the peak selling period of the year, thus, long-term averages would
> be deflated. Additionally, one may no longer be able to determine the
> commoness or rarity of any particular item - especially if one
> differentially records rare items at the expense of common items.
>
> << As for rating systems, I DON'T believe in them or use them, as
> they're too subjective and open to interpretation. >>
>
> Condition is everything when it comes to appraising an items value
> (Garage Sales 101). If one doesn't use some standard to judge condition,
> the price range becomes ambiguously broad and the mean becomes
> confounded by average condition (LN- for a 8mm Zuiko Fisheye, but BGN
> for an OM-1).
>
> OK, this might seem like nit-picking from yet another person who just so
> happens to have a specialized professional knowledge. Statistics is the
> only mathematics which ever captured my interested. It is a lot like
> science - if you don't get the theory and methodology down pat, the
> results are unreproducable and the conclusions flawed.
>
> Gary Reese
> Las Vegas, NV
>
>
> < This message was delivered via the Olympus Mailing List >
> < For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
> < Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
>
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|