Productivity Testing of A1 Media

Bob xyzbbruner at
Mon Jan 5 21:32:42 EST 2004

On 4 Jan 2004 23:32:56 -0800, petethompson at (Pete) wrote:

>I'm looking to set up an experiment to determine whether or not A1
>media (used for feacal coliform determination - MPN technique)with
>different preparation dates produces significantly different numerical
>results when inoculated with the same original sample/samples.
>Media of varying ages (ie day 1, day 3, day 5, day 7, day 9, day 12,
>day 15)will be used.
>Any suggestions on the best way of performing this experiment?

Suggest that you sit down with a  statistician. Good for you for doing
this in advance. So many expts get done that do not really have the
power to show what it is intended they show.


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