Small Area Health Insurance Estimates

SAHIE Demographic and Income Model Methodology 2001: Standard Errors and Confidence Intervals

One goal of the small area work is to provide measures of uncertainty surrounding the estimates. The model-based estimates shown in the tables are accompanied by their 90-percent confidence intervals constructed using a normal approximation from the estimated posterior standard deviations. The confidence intervals are Bayesian credible regions. Confidence interval half-widths for estimated numbers are rounded up to preserve coverage probabilities.