[Pil-pc-oceania] PPP, flying blind and type 1 errors

[pacific-edge]

Yes, errors do have numbers. Type 1 error is sometimes used by computer
nerds and comes from an arcane ppractice known as statistics. A Type 1 error
is a statisticians construct.

Here's how Wikipedia sees it:

Type 1 error: Type I error

Type I error, also known as an "error of the first kind", an αn error, or a
"false positive": the error of rejecting a null hypothesis when it is
actually true. In other words, this is the error of accepting an alternative
hypothesis (the real hypothesis of interest) when the results can be
attributed to chance. Plainly speaking, it occurs when we are observing a
difference when in truth there is none (or more specifically - no
statistically significant difference).

A false positive normally means that a test claims something to be positive,
when that is not the case. For example, a test saying a woman is pregnant
when she is actually not pregnant is an example of a false positive.

[edit] Type II error

Type II error, also known as an "error of the second kind",

...Russ


On 10/7/07 2:52 PM, "jedd" <jedd at progsoc.org> wrote:

> On Tue, 10 Jul 2007, tamara griffiths wrote:
>> There are types of errors?
> 
>  (318 redundant lines snipped)
> 
>  Well, at least one type, which has been numbered 1, and that
>  implies there are or will be others.
> 
>  I think it's a synonym for 'fundamental', but can't see any value
>  to describe a fundamental error as anything other than that .. except
>  perhaps to try to imbue some ersatz scientific aura to the concept.
> 
>  If someone suggests we adopt 5 zones of errors .. I'm outta here.
> 
>  Jedd.
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