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Standardized mean difference: Coverage of 95% confidence intervals for δ when δ=0 (top two rows) and 2 (bottom two rows), q=.5, n=20,40, and K=5,10,30. Light gray line at 0.95. DL, DerSimonian‐Laird; HKSJ, Hartung‐Knapp‐Sidik‐Jonkman; J, Jackson; KDB, Kulinskaya‐Dollinger‐Bjørkestøl; MP, Mandel‐Paule; REML, restricted maximum‐likelihood [Colour figure can be viewed at http://wileyonlinelibrary.com]
