Contact:

Skype: naught101

XMPP/Googletalk: naught101@jabber.org

5h
revised What did ancient cuneiform notation look like, and how did it work?
link to wikipedia article
6h
answered What did ancient cuneiform notation look like, and how did it work?
9h
accepted Is the significance of difference in slopes equivalent to the significance of the slope of the difference of two series?
9h
comment Is the significance of difference in slopes equivalent to the significance of the slope of the difference of two series?
Cool, thanks, I had a vague idea that it might require error independence, but I wasn't sure.
1d
asked Is the significance of difference in slopes equivalent to the significance of the slope of the difference of two series?
1d
comment Test a significant difference between two slope values
@rpierce: Maybe you can post the details of what your talking about in a separate answer, for those of us without access to that book?
1d
accepted Usage of "symmetrical" and "symmetric"
2d
comment A psychology journal banned p-values and confidence intervals; is it indeed wise to stop using them?
@nikie: And then you would offer them the option to use it again, if they first learn how to use it properly.
2d
awarded Famous Question
2d
awarded Notable Question
2d
accepted What does correlation mean in error propagation?
2d
comment What does correlation mean in error propagation?
argh... sorry, getting $y$ and $z$ mixed up in my head :( I think it all makes sense now
2d
revised What does correlation mean in error propagation?
edited tags
2d
comment What does correlation mean in error propagation?
Thanks for the added details. Given your answer, I understand the $x-y$ having a standard deviation of 0 (mistake in your answer there), and $x-z$ having a std dev of $\sqrt{2}$, but I would expect $b-c$ to have a non-zero variance, because it is effectively two partially correlated variables - $(x+y) - (y+z)$ where $x$ and $y$ are correlated. Is that different to $(x+y-y)-z = x-z$ (std.dev=1.414...)?
2d
revised What does correlation mean in error propagation?
clarification and expansion
2d
comment What does correlation mean in error propagation?
I understand what the code is doing, I'm just not clear why.
2d
revised Conditional import of modules in Python
add link to SVN repo
2d
comment Can functions like sin() be redefined, in Fortran, C or Java?
is there a practical difference between using a self-defined sin(), as in the top two answers, and "overriding"? If you're talking about a specific language, you should say so.
2d
revised Can functions like sin() be redefined, in Fortran, C or Java?
Correct spelling
2d
comment A psychology journal banned p-values and confidence intervals; is it indeed wise to stop using them?
What whuber said about sardoncism :P
1 2 3 4 5