Combining Effect Sizes. What to Combine? How to do it?. What to Combine? (1). Whether effect sizes can/should be combined is controversial Safe if studies are replications (identical IV, DV, design, only difference is observations)
Related searches for Combining Effect Sizes
What to Combine?
How to do it?
M = 1.8/3
Unbiased, consistent, but not efficient estimator.
(cf .6 w/ unit wt)
(Unit weights are special case where w=1.)
Note that for two of three of these, the parameter is not part of the weight. For r, however, larger observed values will get more weight. Mean can be biased.