Confidence interval estimates of parameters convey more information to
the reader than do simple point estimates. Univariate confidence intervals
for several parameters, however, do not take into account correlations
among the estimators of the parameters. Furthermore, the individual confidence
coefficients do not reflect the overall degree of confidence in the joint
statements. Joint confidence regions address these two points. Univariate
confidence interval estimates are discussed briefly before proceeding to a
discussion of joint confidence regions.