置信区间估计（confidence intervalestimate）是对x的一个给定值x0，求出y的平均值的区间估计。设x0为自变量x的一个特定值或给定值；E（y0）为给定x0时因变量y的平均值或期望值。
文中详细讨论了多个状态下二元正态分布均值和方差的无偏估计和置信区间估计。
Then it can establish the estimators of means and covariance matrix of the multivariate normal distribution, and estimate their confidence limits and intervals in each state.
基于左截断右删失数据下的乘积限估计构造了分位数固定宽度序贯置信区间及其估计，研究了序贯置信区间估计的渐近性质。
The Bahadur representations for this quantile estimator are established in order to derive asymptotic properties of the sequential fixed-width confidence intervals estimation for quantiles.
单独来看，所有痰涂片阳性肺结核检出率估计为72%(95%的置信区间：53 - 91)。三个估值的总平均数为70%(95%的置信区间：58 - 82)。
The separate estimate for all smear-positive tuberculosis cases was 72% (95% CI: 53-91), giving an overall average for the three estimates of 70% (95% CI: 58-82).
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