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 overlaps with 0.5. I was under the impression that this would lead me to conclude that there was no significant difference between the sample mean and 0.5. - However, when I perform a t-test it tells me that my mean /is/ significantly different from 0.5. The confidence intervals returned by the t-test don't seem to match with the SEM I calculated (lm does return the same intervals). I have tried this in both R and matlab with the same results. So I think I'm calculating things right. Am I misinformed about the interpretation of the SEM? What are the confidence limits returned by the t-test (they bear no relationship to the SEM)? Thanks! Rob ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
