size.ci.agree {statpsych}

Sample size for a G-index confidence interval

Description

Computes the sample size required to estimate a population G-index of agreement for two dichotomous ratings with desired confidence interval precision. Set the G-index planning value to the smallest value within a plausible range for a conservatively large sample size.

Usage

size.ci.agree(alpha, G, w)

Arguments

alpha

alpha level for 1-alpha confidence

G

planning value of G-index

w

desired confidence interval width

Value

Returns the required sample size

Examples

size.ci.agree(.05, .8, .2)

# Should return:
# Sample size
#         139