Quick Normal Distribution Clarification

[mvjs]

Hi all,

Just a quick clarification:

When representing the given information for a normal probability distribution, is it:

X~N(mean,var(x))

or

X~N(mean,standard deviation).

Just been given some conflicting messages.

Thanks in advance.

[davidle_10]

X~N(mean,var(x))

[mvjs]

Thanks!

[rubiks]

in the 2009 examiner's report it has it as X~N(mean,sd)..

[qshyrn]

in the 2009 examiner's report it has it as X~N(mean,sd)..

no it doesnt . its just cuz the variance was 1 

[rubiks]

Oh yeah, that's right. Sorry

[Stroodle]

wtf. I've always used X~N(mean,sd). I thought that was the convention.

I just did a quick google search also, and it says that this is the notation.

[schnappy]

It's VCE what'd you expect, correctness?

[gossamer]

wtf. I've always used X~N(mean,sd). I thought that was the convention.

I just did a quick google search also, and it says that this is the notation.

That's what I was taught too (X~N(mean,sd). I think :|
My brother told me I should just write in words that it's a normal distribution, and then write mean= ...... and sd=.......
*shrug*

[rubiks]

My textbook says its variance aswell

So X~N(mean,variance) OR  X~N(mean, sd^2)

[gossamer]

My textbook says its variance aswell

So X~N(mean,variance) OR  X~N(mean, sd^2)

I couldn't find it in my textbook Damnit

[Stroodle]

Yeah, just checked the study design, and it uses variance:

" - standard normal distribution, N(0, 1), and transformed normal distributions, N(μ, σ2), as examples
of a probability distribution for a continuous random variable..."

Hope I don't trip up on this one; so used to using sd now.

[Jdog]

i just write normal mean= something and Standard deviation = something

[stonecold]

X~N(mean,var(x))

It is this...

[Jdog]

can we simply write

normal, mean = 10 and sd = 5 ,
(for example )