standard normal deviation

The steps include confirming the normal distribution mean value and standard deviation, choosing the relational method to design, and to generate the working space matrix.

分为确定正态分布均值及方差、选择相应方式进行试验设计、生成工作空间矩阵等步骤。

The lognormal distribution , like the normal, is completely specified by its mean and standard deviation.

对数正态分布,如同正态,以其平均值和标准差被完全地指明.

Based on the condition that the performance test data of liquid rocket engine is subject to normal distribution with constant standard deviation, the Bayes method is used to analyze the environment factor of ground and space performance test.

基于液体火箭发动机性能试验数据服从正态分布的条件，假定天地试验环境下分布的标准差不变，运用Bayes方法对正态分布天地试验条件下的环境因子进行分析。

We process the data of normal group with independent sample t test, and operation group by paired t test. Results: All indexes were calculated the mean and standard deviation.

所得数据正常组采用独立样本t检验，手术组采用配对t检验。结果：所有指标均计算得出均值及标准差。