[R] Fisher transformation for pooling estimates - p values > 1

2011-08-23 Thread lifty . gere
Dear all, I am using Fisher r to z transformation for pooling partial correlation estimates over multiple imputed data (number of imputations = 200). The number of observations in my data is 190. Unfortunately, when i calculate p values for the pooled estimates, some of them are p > 1 (ranging

[R] Impact of multiple imputation on correlations

2011-08-01 Thread lifty . gere
Dear all, I have been attempting to use multiple imputation (MI) to handle missing data in my study. I use the mice package in R for this. The deeper I get into this process, the more I realize I first need to understand some basic concepts which I hope you can help me with. For example, let u