Confidence interval for the population root mean square error of approximation (RMSEA).
ci.rmsea(rmsea, df, N, conf.level = 0.95, alpha.lower = NULL,
alpha.upper = NULL)
returns the upper and lower limit as well as the observed value of the RMSEA.
observed root mean square error of approximation
degrees of freedom of the model
sample size
desired confidence level (e.g., .90, .95, .99)
the Type I error rate for the lower tail
the Type I error rate for the upper tail
Ken Kelley (University of Notre Dame; KKelley@ND.Edu)
Provides a confidence interval for the population root mean square error of approximation (RMSEA) using the noncentral chi-square distribution (e.g., Steiger & Lind, 1980).
Steiger, J. H., & Lind, J. C. (1980). Statistically-based tests for the number of common factors. Paper presented at the annual Spring meeting of the Psychometric Society, Iowa City, IA.