Re: st: RE: Graphs, pull out random values at peak interval

[Knag Anne-Christine <anne-christine.knag@imr.no>]

As 25 starting from a not randomly selected date until another not randomly
selected date.
AC


On 6/6/07 7:13 PM, "Nick Cox" <n.j.cox@durham.ac.uk> wrote:

> In what sense would these days be randomly selected?
> As 25 from some larger number? As 25 starting from
> some randomly selected date?  Or what?
> 
> Nick 
> n.j.cox@durham.ac.uk
> 
> Knag Anne-Christine
> 
>> I have plotted production for 7 different groups over a time period of
>> around 100 days. There were some days without production,
>> these days varied
>> between the groups. Production began and ended at different
>> days in each of
>> the groups. I want to compare 25 random days at the middle of
>> the production
>> period between and within groups (1factor anova). But how can
>> I pull out 25
>> random days in the middle using STATA?
>> 
>> I have another comparison where I am looking at the max size
>> of the product
>> that were measured each day. The max size peaks over a period
>> of around 7
>> days. The peaks occurs at different times between the groups.
>> How can I
>> compare the sizes within and between the groups during just the peak?
> 
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