Objective: To introduce the methods for sample size estimation based on width of confidence interval.
目的：介绍基于置信区间宽度的样本含量估计方法。
Sample size formulae that control the width of confidence interval with a certain confidence level are proposed.
导出在一定置信水平下控制置信区间宽度的样本量公式。
Sample size formulae that control the width of confidence interval with a certain confidence level are proposed.
导出在一定置信水平下控制置信区间宽度的样本量公式。
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