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)
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
returns the upper and lower limit as well as the observed value of the RMSEA.
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.