test.prop.ps: Hypothesis test for a paired-samples proportion difference

In statpsych: Statistical Methods for Psychologists

Hypothesis test for a paired-samples proportion difference

Description

Computes a continuity-corrected McNemar test for equality of population proportions in a paired-samples design. This function requires the frequency counts from a 2 x 2 contingency table for two paired dichotomous measurements. A confidence interval for a difference in population proportions (see ci.prop.ps) is a recommended supplement to the McNemar test.

Usage

test.prop.ps(f00, f01, f10, f11)

Arguments

f00	number participants with y = 0 and x = 0
f01	number participants with y = 0 and x = 1
f10	number participants with y = 1 and x = 0
f11	number participants with y = 1 and x = 1

Value

Returns a 1-row matrix. The columns are:

• Estimate - ML estimate of proportion difference

• z - z test statistic

• p - two-sided p-value

References

\insertRef

Snedecor1980statpsych

Examples

test.prop.ps(156, 96, 68, 80)

# Should return:
# Estimate        z          p
#     0.07 2.108346 0.03500109

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