CIrdif: Confidence Interval for the difference in Correlation...

In psychometric: Applied Psychometric Theory

Confidence Interval for the difference in Correlation Coefficients

Description

Will construct the CI for a difference in two correlations for a desired level

Usage

CIrdif(r1, r2, n1, n2, level = 0.95)

Arguments

r1	Correlation 1
r2	Correlation 2
n1	Sample size for r1
n2	Sample size for r2
level	Significance Level for constructing the CI, default is .95

Details

Constructs a confidence interval based on the standard error of the difference of two correlations (r1 - r2), sed <- sqrt((1-r1^2)/n1 + (1-r2^2)/n2)

Value

Returns a table with 4 elements

DifR	Observed Difference in correlations
SED	Standard error of the difference
LCL	Lower Confidence Limit of the CI
UCL	Upper Confidence Limit of the CI

Author(s)

Thomas D. Fletcher [e-mail]

References

Cohen, J., Cohen, P., West, S. G., & Aiken, L. S. (2003). Applied multiple regression/correlation analysis for the behavioral sciences (3rd ed.). Mahwah, NJ: Lawrence Erlbaum.

See Also

rdif.nul

Examples

# From ch. 2 in Cohen et al (2003)
CIrdif(.657, .430, 62, 143)

psychometric documentation built on Nov. 6, 2023, 1:06 a.m.