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


From   "Nick Cox" <[email protected]>
To   <[email protected]>
Subject   st: RE: Graphs, pull out random values at peak interval
Date   Wed, 6 Jun 2007 18:13:37 +0100

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 
[email protected] 

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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