[R] Different results in calculating SD of 2 numbers
Jim Lemon
jim at bitwrit.com.au
Wed Jan 16 11:32:06 CET 2008
(Ted Harding) wrote:
> On 16-Jan-08 08:45:04, Martin Maechler wrote:
>
>>>>>>>"RM" == Ron Michael <ron_michael70 at yahoo.com>
>>>>>>> on Wed, 16 Jan 2008 00:14:56 -0800 (PST) writes:
>>
>> RM> Hi all,
>> RM> Can anyone tell me why I am getting different results in
>>calculating SD of 2 numbers ?
>>
>> >> (1.25-0.95)/2
>> RM> [1] 0.15
>> >> sd(c(1.25, 0.95))
>> RM> [1] 0.2121320 # why it is different from 0.15?
>>
>>because 1 is different from 2 !
>>If 2 was 1, than sqrt(2) == 1 as well, but actually I don't
>>think the universe and we all would exist in that case ....
>>Martin Maechler, ETH
>
>
> Of course we would!! -- Since FALSE implies X is TRUE for any X.
>
> But FALSE would also imply that X is FALSE, so you are entitled
> to your view as well, Martin.
>
Then again, as pi might have been equal to 1 prior to the Big Bang, I
see no reason why sqrt(2) shouldn't have been equal to 1 as well. After
all, in those days we were all one...
Jim
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