ci.ratio.prop2: Confidence interval for a 2-group proportion ratio

In statpsych: Statistical Methods for Psychologists

Confidence interval for a 2-group proportion ratio

Description

Computes an adjusted Wald confidence interval for a population proportion ratio in a 2-group design.

Usage

ci.ratio.prop2(alpha, f1, f2, n1, n2)

Arguments

alpha	alpha level for 1-alpha confidence
f1	number of participants in group 1 who have the attribute
f2	number of participants in group 2 who have the attribute
n1	sample size for group 1
n2	sample size for group 2

Value

Returns a 1-row matrix. The columns are:

• Estimate - adjusted estimate of proportion ratio

• LL - lower limit of the adjusted Wald confidence interval

• UL - upper limit of the adjusted Wald confidence interval

References

\insertRef

Price2008statpsych

Examples

ci.ratio.prop2(.05, 35, 21, 150, 150)

# Should return:
# Estimate       LL       UL
# 1.666667 1.017253 2.705025

statpsych documentation built on Sept. 11, 2024, 7:42 p.m.