Dennis Roberts wrote:
> as a start, you could relate everyday examples where the notion of CI
> seems to make sense
>
> A. you observe a friend in terms of his/her lateness when planning to
> meet you somewhere ... over time, you take 'samples' of late values ...
> in a sense you have means ... and then you form a rubric like ... for
> sam ... if we plan on meeting at noon ... you can expect him at noon +
> or - 10 minutes ... you won't always be right but, maybe about 95% of
> the time you will?
>
> B. from real estate ads in a community, looking at sunday newspapers,
> you find that several samples of average house prices for a 3 bedroom, 2
> bath place are certain values ... so, again, this is like have a bunch
> of means ... then, if someone asks you (visitor) about average prices of
> a bedroom, 2 bath house ... you might say ... 134,000 +/- 21,000 ... of
> course, you won't always be right but .... perhaps about 95% of the time?
>
I suppose that in such situations most people would prefer to know 2SD
instead of 95%CI.
k
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