ci.ratio.prop.ps: Confidence interval for a paired-samples proportion ratio

In statpsych: Statistical Methods for Psychologists

Confidence interval for a paired-samples proportion ratio

Description

Computes a confidence interval for a ratio of population proportions in a paired-samples design. This function requires the frequency counts from a 2 x 2 contingency table for two repeated dichotomous measurements.

Usage

ci.ratio.prop.ps(alpha, f00, f01, f10, f11)

Arguments

alpha	alpha level for 1-alpha confidence
f00	number of participants with y = 0 and x = 0
f01	number of participants with y = 0 and x = 1
f10	number of participants with y = 1 and x = 0
f11	number of participants with y = 1 and x = 1

Value

Returns a 1-row matrix. The columns are:

• Estimate - estimate of proportion ratio

• LL - lower limit of the confidence interval

• UL - upper limit of the confidence interval

References

\insertRef

Bonett2006astatpsych

Examples

ci.ratio.prop.ps(.05, 12, 4, 26, 6)

# Should return:
# Estimate       LL       UL
#      3.2 1.766544 5.796628

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