To Empty or not to Empty my Tins?

[Dr Stevil]

I'm not too sure Tom, we can't assume the data will be normally distributed
Of course we can always invoke Bayesan statistics and just go with the hunches

Right!! enough of that!
More of this  

[tom]

Originally Posted by [b

Quote[/b] (Steve W @ Feb. 26 2004,18:22)]I'm not too sure Tom, we can't assume the data will be normally distributed

Well obviously one would check that prior to analyses. But if the data don't approximate normality (which one would expect, given a decent sized sample) then I don't know if it's a sensible question to be asking anyway.

Speaking of which, what WAS the original question again?




PS

Originally Posted by [b

Quote[/b] ]
Of course we can always invoke Bayesan statistics and just go with the hunches

uuggh, dirty.

[tom]

Originally Posted by [b

Quote[/b] (Digger @ Feb. 26 2004,17:29)]I can see the ethical review committee just putting their big NO stamp on the front of an application for that! He must have had one hell of a proposal...

As I recall, he had to promise to stop hurting them if they began to cry.

You should have seen his apparatus - a home-made thumbscrew. Literally. I always refused to be a subject for some reason.

[Reeve]

<font color='#000F22'>Last season a buddy of mine, jumped in with me for his first dive of the season, having not used his gear in some 18mths. After the first dive (obviously a &lt;20m potter) he had a splitting headache and dizziness which was attributed to poor / bad air. The cause was never assertained and he just refilled bottle prior to next outing.

[Mary]

<font color='#F52887'>so from this do we have a general concensus as to how long it is safe to store a fill, just asking cause I got my 7s filled before leaving stoney the other day and am not sure when i'll be in the water next.

[Janos]

Originally Posted by [b

Quote[/b] (BrianG @ Feb. 26 2004,16:48)]. The air when analysed contained less than 10% O2. The cylinder was found to contain water and in excess of one pound of ferous oxide.

I'm a freelance scientist, and I can't quite believe this. The amount of oxygen in a pound of rust (about 3 mol) is about 60 litres at room temperature. Which would takes it down to about 18%.

If anything the poor chap died from inhaling the rust, not the lack of O2.

How sad am I

Laters,
&nbsp; &nbsp;Janos

[Mary]

Originally Posted by [b

Quote[/b] (Janos @ Feb. 26 2004,20:49)]How sad am I

<font color='#F52887'>Well you're a scientist do I really need to continue............. &nbsp;

[Dr Stevil]

Oi! I resemble that!
fecking medics... pah! using our titles and claiming them for their own

[daveking]

<font color='#0000FF'> &nbsp; &nbsp; &nbsp; &nbsp;

[ahar]

Trying to get back to the original question (before someone mentions the O2 content of the air millions of years ago or stromatolites). &nbsp;I stored my cylinders for 8 months (went travelling) and the air seemed to be fine when I tasted it, but I didn't trust it and got the tanks tested to make sure they were okay (which they were)