pBox(zo = p2z(0.01), zr = p2z(0.02), c = 2)
pBox(zo = p2z(0.02), zr = p2z(0.01), c = 1/2)
pBox(zo = p2z(0.02, alternative = "one.sided"),
zr = p2z(0.01, alternative = "one.sided"),
c = 1/2, alternative = "one.sided")
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