2004-09-20 [shotokan_gal]: and I really ought to find me old notes... won't be a minute

2004-09-20 [Firenze]: Okie Doke!

2004-09-20 [Firenze]: I know how to find the mean of the question, but I don't know how to do the rest, so I will send the questions in a message ok.

2004-09-20 [shotokan_gal]: Rightio...

2004-09-20 [Firenze]: sent it

2004-09-20 [shotokan_gal]: Right, well, this stuffs a little hard to write out in type... so gimme a minute. You've got the standard deviation formula though I assume?

2004-09-20 [Firenze]: Yeah I have that

2004-09-20 [shotokan_gal]: Which one is it you're using? If you can write it out in words... (I'll know what you mean)

2004-09-20 [Firenze]: Square root Sxx/n-1

2004-09-20 [shotokan_gal]: Sxx... is that the sum of (x - m)^2? m being the mean... which did you get 2.36 for?

2004-09-20 [Firenze]: yeah I got that, I think *Checks Notes*

2004-09-20 [Firenze]: i got that, its the root square mean deviation i don't get

2004-09-20 [Firenze]: don't worry about it my mate who is in the same maths group as has just phoned me I will ask him, thanks for your help, by the way what subjects are you studying or have you studied?

2004-09-20 [shotokan_gal]: Well, I'm writing out the working of the standard deviation on a wiki page at the moment which I'll direct you to in a sec... but whats this root square mean deviation thing? Just the sd?

2004-09-20 [Firenze]: I will send you through the equation

2004-09-20 [Firenze]: square root Sxx/n = sqaure root 1/n Side ways m(x-xwith a hat on)squared

2004-09-20 [Firenze]: Confusing I know

2004-09-20 [shotokan_gal]: lol thats ok... the 'side ways m' I think you'll find is sigma. which means the sum of

2004-09-20 [shotokan_gal]: x with a hat on would be x bar... the mean

2004-09-20 [shotokan_gal]: so really the only difference between the two formulas is ones over n - 1 and ones over n right?

2004-09-20 [Firenze]: yep