| meanp {metap} | R Documentation |
Combine p values by the mean p method
meanp(p) ## S3 method for class 'meanp' print(x, ...)
p |
A vector of p-values |
x |
An object of class ‘ |
... |
Other arguments to be passed through |
Defined as
z = (0.5 - mean(p)) * sqrt(12k)
which is a standard normal
The values of p should be such that 0<=p<=1. A warning is issued if this means that studies are omitted and an error results if, possibly after deletion of illegal values, fewer than four studies remain.
The plot method for class ‘metap’ calls schweder on the valid
p-values
An object of class ‘meanp’ and ‘metap’,
a list with entries
z |
Value of z |
p |
Associated p-value |
validp |
The input vector with illegal values removed |
Michael Dewey
Becker, B J. Combining significance levels. In Cooper, H and Hedges, L V, editors A handbook of research synthesis, chapter 15, pages 215–230. Russell Sage, New York, 1994.
Rosenthal, R. Combining the results of independent studies. Psychological Bulletin, 85:185–193, 1978.
See also schweder
data(rosenthal) meanp(rosenthal$p) # 2.17, p = 0.015 one tailed