Re: [R] relationship between t-test CI and SEM?

2008-03-10 Thread Rob Campbell
Thanks for the replies and apologies for not including code. Bad of me. >Chuck Cleland wrote: >I get the same confidence intervals with t.test(), lm(), and by hand. >We need to see how you calculated the SEM and constructed the interval. >Perhaps you constructed the interval using the norm

[R] relationship between t-test CI and SEM?

2008-03-09 Thread Rob Campbell
Hi, I have what is probably a stupid question but I'm confused so here goes: - I have a distribution (n=100) and want to determine if the mean is significantly different from 0.5. - When I plot the 2-tailed 95% confidence limits for the standard error of the mean I find that the upper one just