R help - Dec 2013 - Test to determine if there is a difference between two means

Hi,
I have a data set where there are 20 experiments which each ran for 10 minutes.
In each experiment an insect had a choice to spend time in one of two chambers.
Each experiment therefore has number of seconds spent in each chamber. I want to
know whether there is a difference in the mean time spent in each chamber.

I was going to do a t-test but was advised that there was a better way,
something about introducing random numbers? I was hoping someone could help?

Thanks
Wes
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Inline below.

 Cheers,

Bert Gunter
Genentech Nonclinical Biostatistics
(650) 467-7374

"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
H. Gilbert Welch




On Tue, Dec 24, 2013 at 7:38 AM, wesley bell <wesleybell11 at yahoo.com>
wrote:
> Hi,
> I have a data set where there are 20 experiments which each ran for 10
minutes. In each experiment an insect had a choice to spend time in one of two
chambers. Each experiment therefore has number of seconds spent in each chamber.
I want to know whether there is a difference in the mean time spent in each
chamber.
Yes, there is. Always.
>
> I was going to do a t-test but was advised that there was a better way,
something about introducing random numbers? I was hoping someone could help?
This list is about R, not statistics, although they certainly overlap.
 I suggest you post on stats.stackexchange.com instead for statistics
help. Better yet, you might do well to talk with a local expert about
statistical issues, as you are obviously weak here.

> Thanks
> Wes
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>
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