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And lo On Wed, 17 Mar 2010 02:33:08 -0000, Jim Charter <jrc### [at] msn com>
did spake thusly:
> Phil Cook v2 wrote:
>
>> So taking the results you've given I'm just guessing you've got a
>> low-scoring class; or the 'wrong' answer grid you're using is very
>> similar to the 'correct' one.
>>
>
> Yes, a small, fixed number of wrong answers on the marking key would
> give the same result I suspect also. But it is interesting to me how
> intuitively we discount the possibility that the one high score is a
> random outcome, but rather the proof that the key is okay, or mostly
> okay, and the class is low scoring.
Ah, but that's psychology rather than probability ;-) But yes, I suspect
it's because we're used to clusters cropping up naturally. When an extreme
appears we assume intention. If it had been a really low score would you
have taken that as proof that the key was wrong?
--
Phil Cook
--
I once tried to be apathetic, but I just couldn't be bothered
http://flipc.blogspot.com
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