dichod.zvar: variance of z converted from dichotomizing/extreme group...

In phoebehlam/michaela: convert statistical metrics for meta-analytic purpose

variance of z converted from dichotomizing/extreme group design d

Description

compute the variance of z from a cohen's d derived from dichotomizing/extreme group design
see pustejovsky, 2014. psychological methods.

Usage

dichod.zvar(d, p1, p2, n1, n2, type = c("vd.ce", "vd.eg"))

Arguments

d	cohen's d
p1	cutoff percentile for group 1 (sample-based, please see other formulas for population-based in pustejovsky, 2014)
p2	cutoff percentile for group 2 (sample-based, please see other formulas for population-based in pustejovsky, 2014)
n1	cell size of group 1
n2	cell size of group 2
type	select one (read pustejovsky, 2014. psychological methods. for recommendations there are situations where the "controlled experiment" formulas are recommended even for stats derived from dichotomize/extreme group designs so please refer to his paper) "vd.ce" compute variance of d using the controlled experiment formulas "vd.eg" compute variance of d using the extreme group formulas

Examples

dichod.zvar(.80, 1/3, 1/3, 15, 15, "vd.ce")

phoebehlam/michaela documentation built on Oct. 23, 2024, 4:10 p.m.