在以前，只能针对一些常见的PDF(比如gaussian)和简单的统计数据(比如平均值)计算置信区间。

Historically, confidence intervals could only be easily calculated for a few common PDFs (such as the Gaussian) and simple statistics (such as the mean).

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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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