According to data provided by doctor, under the assumption that sample is normal, performed frequency analysis, pair test and variance analysis.
针对医生提供的数据，在样本服从正态分布的假设下，进行了频数分析、配对检验和方差分析。
2
The experiments results shown that the effect of rotational speed variance on the desalination and its efficiency wer. e obvious under same experiment condition.
实验结果表明，在实验条件相同的情况下，离心转速的变化对灰白冰的脱盐、脱盐效果均有显著影响。
3
The state vectors expectation, variance and covariance matrices are given under the conditions of the systems with regular infinite extreme point and singular infinite extreme point.