127. “A picture is worth
a thousand p values.”
(Loftus, 1993)
Comparison 1
Mean
40455055606570
1 2
n = 20 n = 20
p = .12
d = 0.5
Comparison 2
Mean
40455055606570
1 2
n = 200 n = 200
p < .001
d = 0.5
149. メタ分析で得られた効果量を使って
検定力を0.8以上にするためには?
• d = 0.76(メタ分析で得られた効果量)
• α = .05(two-sided)
• Power = 0.8(目標検定力)
(A) 処置群・対照群デザイン
n = 28.17086NOTE: n is number in *each* group