3 ms·
p-value testing and confidence interval testing are not interchangeable? also, p-values are used to determine the number of effects in a mixed model, or the nu
by hessenwolf 11y ago
p-value testing and confidence interval testing are not interchangeable?
also, p-values are used to determine the number of effects in a mixed model, or the number of factors in an ANOVA, etc. Sometimes confidence intervals on abstract parameters can be a bit less useful.
- travjones 11y agoYou are correct, they are not interchangeable. I didn't suggest that they were. I was offering CIs as an alternative for examining effects in general (e.g., comparing two groups); however, your choice of data representation will always depend on the question that you're asking. Nonetheless, p-values in and of themselves provide no information about the magnitude of an effect. Why not show the actual data?
- hessenwolf 11y agoI guess you mean clinical significance. http://www.bmj.com/content/348/bmj.g2130 http://www.bmj.com/content/348/bmj.g2130 This is a secondary issue. For most non-stats people, I wouldn't recommend the confidence interval as a measure of clinical significance. I'd rather look at the actual distribution of the two effects and view quantiles of the predictive interval. And, yes, in hypthoesis testing, p-values and confidence intervals are generally interchangeable. All they speak of is the overlap of the sample distribution of means, really.
- deleted 11y ago[deleted]