二是通过提高置信水平来增大样本量。

Secondly, the sample size could be enlarged through improving the confidence level.

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.

通过定义灰差、属性权重映射和灰置信水平等概念，提出假设检验多传感器时间序列相容性的灰否定域。

And grey rejection region of hypothesis testing for compatibility of time series of multi-sensor through definition of concepts, grey difference, attribute weight mapping and grey confidence level.