Hi there,
i think that's not what i was aiming for...
i was aked to
Generate 50 Bootstrap samples and corresponding estimates
if i do data[sample(nrow(data),size=50,replace=TRUE),]
it will give me a table of 50 rows ( 50 sets of x and y)
then how do i estimate the mean? ( mean was esitmated by the bar{x}/bar{y} )
i mis undertood that too.
but now, i think what i actually need is
50 sets of this kind (49 rows) of tables from bootstrapping
so that i can have 50 different 'bar{x}/bar{y}' s
then to estimate the mean...
Thanks.
casper
Ben Bolker wrote:
>
> casperyc <casperyc <at> hotmail.co.uk> writes:
>
>> I have 49 pairs in my data.frame 'data'
>>
>> x y
>> 76 80
>> ... ...
>>
>> how do I get a bootstrap sample of size n=50?
>>
>
> data[sample(nrow(data),size=50,replace=TRUE),]
>
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