Displaying 2 results from an estimated 2 matches for "listeria".
2010 Jul 12
2
Question about food sampling analysis
...about
statistics and secondarily about R. I have just started a new job that
(this week, apparently) requires statistical knowledge beyond my training
(as an epidemiologist).
The problem:
- We have 57 food production facilities in three categories
- Samples of 4-6 different foods were tested for listeria at each facility
- I need to describe the presence of listeria in food (1) overall and (2) by
facility category.
I know that samples within each facility cannot be treated as independent,
so I need an approach that accounts for (1) clustering within facilities and
(2) the different number of sampl...
2010 Aug 12
5
Where the data file is stored?
Hi folks,
OS - Ubuntu 10.04
On R I create a datafile named "data". I can evoke it on R with;
> data
On R Commander
Data -> Active data set -> Select active data set -> (data) OK
only one data set there "data"
-> View data set
I can read it
-> Edit data set
showing 25 rows of data. Clicking the box shows a thick border around it. But
I couldn't