CIrdif: 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
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
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) $
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.