d_prec {pwr2ppl}

Compute Precision Analyses for Standardized Mean Differences

Description

Compute Precision Analyses for Standardized Mean Differences

Usage

d_prec(d, nlow, nhigh, propn1 = 0.5, ci = 0.95, tails = 2, by = 1)

Arguments

d

Standardized means difference between groups

nlow

starting total sample size

nhigh

ending total sample size

propn1

Proportion in First Group

ci

Type of Confidence Interval (e.g., .95)

tails

number of tails for test (default is 2)

by

Incremental increase in sample (e.g. nlow = 10, nhigh = 24, by = 2, produces estimates of 10, 12, and 14)

Value

Precision Analyses for Standardized Mean Differences

Examples

d_prec(d=.4,nlow=100, nhigh=2000, propn1=.5, ci=.95, by=100)