faq
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faq [2020/06/03 23:54] – Wolfgang Viechtbauer | faq [2021/03/13 14:16] – Wolfgang Viechtbauer | ||
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Similar (and much more thorough/ | Similar (and much more thorough/ | ||
- | It may also be useful to note that there is now an appreciable user base of the metafor package | + | It may also be useful to note that there is now an appreciable user base of the metafor package. The [[https:// |
Finally, I have become very proficient at hitting the [[https:// | Finally, I have become very proficient at hitting the [[https:// | ||
Line 75: | Line 75: | ||
!!! The pseudo $R^2$ statistic (Raudenbush, | !!! The pseudo $R^2$ statistic (Raudenbush, | ||
- | ??? For random-effects models fitted with the rma() function, how is the credibility/ | + | ??? For random-effects models fitted with the rma() function, how is the prediction interval computed by the predict() function? |
!!! By default, the interval is computed with $$\hat{\mu} \pm z_{1-\alpha/ | !!! By default, the interval is computed with $$\hat{\mu} \pm z_{1-\alpha/ | ||
- | Note that this differs from Riley et al. (2001), who suggest to use a t-distribution with $k-2$ degrees of freedom for constructing the interval. Neither a normal, nor a t-distribution with $k-1$ or $k-2$ degrees of freedom is correct; all of these are approximations. The computations in metafor are done in the way described above, so that the credibility/ | + | Note that this differs |
??? How is the Freeman-Tukey transformation of proportions and incidence rates computed? | ??? How is the Freeman-Tukey transformation of proportions and incidence rates computed? |
faq.txt · Last modified: 2023/01/24 07:56 by Wolfgang Viechtbauer