均数

计量资料用均数±标准差（x±s）表示。

Measurement data is expressed in mean differences ± standard deviation ( x ± s ) .

断裂均数依次为0.72，0.60和1.65，各组上述参数均高于空白对照组（8.0%，0.14），差异非常显著（P＜0.01，P＜0.01）。

All of above parameters were statistically higher than those in control ( 8.0 % , 0.14 )( P < 0.01 , P < 0.01 ) .

计量资料采用均数士标准差（X±s）表示，应用单因素方差分析进行统计学分析。

The standard deviation and measurement data mean differences said , the application of single factor analysis of variance statistical analysis .

介绍了灰色系统GM（1,1）模型的预测方法，并用该模型对学生近视率进行预测分析，拟合与外推预测的平均误差分别占实测值均数的1.43%和1.21%。

Grey systems model GM ( 1,1 ) was used to predict the student 's myopia rate .

结果：发现Bo－N－Me均数非常接近60°，且具有最小的标准差和极差。

Results : Angle Bo-N-Me was about 60 degree and had the least standard deviation and range .

LH均数较前有所提高，睾酮（T）均数水平较前下降，但无显著性意义（P＞0.05）。

There were no significant difference before and after treatment to the levels LH and T ( P > 0.05 ) .

方差分析表明匀浆和血浆各自ET-1的均数在转流前后有显著性差异（P<0.05）。

The analysis of variance showed notable differences ( P < 0.05 ) .

男性、女性DNA断裂率均数分别为17.98%、17.19%，差别无统计学意义（P>0.05）。

DNA damage frequencies of male and female were 17.98 % and 17.19 % , the difference was not statistically significant ( P > 0 . 05 ) .

数值变量以x±s表示，经正态性和方差齐性检验后，用t检验进行两总体均数的比较。

Numerical variables were represented as x ± s. The normal distribution and variance homogeneity were measured then mean values were compared by the student tests .

统计学处理包括均数±标准差、方差分析、q检验、t检验、秩和检验、直线相关分析。

The statistic methods contained mean standard deviation , ANOVA , ttest , q test , rank test and analysis of linear correlation .

所有结果以均数±标准差表示，组间采用方差分析，P0.05为差异有统计学意义。

All results were presented as mean ± standard deviation , analysed of variance between groups . P 0.05 was considered statistically significant .

各组数据以x±s表示，组间比较采用两样本均数比较的t检验。

Data in every group were expressed with Mean ± SD . t test that was mean comparison of two samples was used to compare among groups .

结果：①高原新生儿体重均数绝对值2915.38g，较对照组少374.42g（P＜0.01）；

Results : ( 1 ) The mean value of newborn weight ( 2915.38 g ) in high altitude group was 374.42 g lower than that in control group ( P < 0.01 ) .

两组中医证候治疗前、治疗后积分经两样本均数配对t检验，（P0.05），差异有统计学意义。

TCM and TCM after the treatment were compared by the two sample paired t test , ( P0.05 ), the difference was statistically significant .

两均数比较的bootstrap法

Comparison of two means by bootstrap

单纯癌大、小细胞型之间、浸润性小叶癌与硬癌之间的Ag&NOR均数有显著性差异（P0.05）；

There was significant difference ( P0.05 ) between large cell type and small cell type of carcinoma simplex or invasive lobular carcinoma and scirrhous carcinoma ;

数据结果采用均数±标准差表示，P0.05为差异有统计学意义。

All data were expressed as mean value ± standard deviation , P-values of less than 0.05 were accepted as statistically significant . Results : 1 .

实验数据用均数±标准差（X士S）表示，组内比较：t检验；组间比较：方差分析。

Experimental data with mean + standard deviations ( X ± S ) said , and in groups ; t test comparison : Comparison : analysis of variance between groups .

结果：各年龄组间的卵泡均数、取卵均数、可移植胚胎均数、移植胚胎均数均随年龄增大而下降，差异有显著性（P＜0.05）；

Results : The mean numbers of follicles , oocytes retrieved , embryos available for transfer and embryos transferred in different age groups were decreased significantly with the increasing of age ( P < 0 . 05 ) .

各组数据应用均数土标准差表示（X±S），应用自身对照比较的t检验进行统计学处理，P＜0.05为差异显著。

Variables were expressed as mean + standard deviation ( x + s ) and self-antitheses t tests were done to evaluate differences , p value of less 0 . 05 was required for significance .

研究结果表明：1.在发球阶段，ACE球的差异较明显，均数在6个。

The results show that : 1 . A technical phase of the tee , ACE ball remarkably different , average in six .

两组均数的比较用t检验，率的比较用x2检验。

Mean were compared by t test and rate compared by X2 test , the both groups .

组间率的比较采用x~2检验，组间均数的比较则采用Z检验，等级资料采用秩和检验，儿童期不良经历与其自杀行为的相关性分析则采用单因素及多因素logistic回归分析。

Chi-square test , Z test , nonparametric test and logistic regression analysis were applied to analyze the prevalence of adverse childhood experience and suicidal behavior and its correlation .

观察各组间vWF、Ps水平的表达情况，数据用均数与标准差表示，各组均数间比较用方差分析q检验，P＜0.01为有统计学意义。

Data are expressed as mean value + sem and compared with individual groups using analysis of variance ; a value of P < 0.01 was required for statistical significance .

潮式呼吸参数用两样本均数t检验和多样本均数的方差分析。结论RSV和MP感染所引起的肺炎均能导致婴幼儿肺功能的损害，主要表现为小气道阻塞性改变。

Conclusion RSV or MP infection in infant with pneumonia results in impaired pulmonary function , especially for obstruction in small airway .

ER阳性组TLI几何均数1.0%，ER阴性组3.2%（P<0.05）；

Geometric mean of TLI in ER positive tumors was 1.0 % , in ER negative 3.2 % ( P < 0.005 ) .

计量资料表达为均数±标准差（x±S），组间比较用两样本的t检验，等级资料用秩和检验，计数资料用卡方检验。

Measurement data expressed as mean ± standard deviation ((?) ± S ), between the two groups using two sample t test , rank sum test using ranked data , count data using chi-square test .

实验结果数据采用均数±标准差表示，组间差异比较用单样本方差t检验，P0.05表示有统计学差异。

The results of data using mean ± standard deviation of that group differences between single - sample t test of variance , P 0.05 indicated statistical difference . Results : 1 .

术后六个月的膝关节功能评分样本均数的比较P＞0.05，无统计学意义，丝线组和张力带组无显著性差异。

Knee joint function of samples in mean value , after six months of the surgery , P > 0.05 , no statistically significant , there were no significant differences between the silk thread group and the tension band group after therapy .

多样本均数检验采用方差分析的方法，方差分析差异有显著性后再进行样本的两两比较（Q检验）。

Variance analysis was used to test mean of many samples , and the differences of two samples were compared after variance analysis so as to show distinct differences ( Q test ) .