The second question to ask is whether the sample is representative? See what I mean?
第二个要问的问题是，样本是否有代表性？明白我的意思吗？
Normally distributed data assumes that about 68% of the values in the sample are within 1 standard deviation of the mean.
正态分布数据认为，样本中约68%的数值分布在距离平均值为1的标准偏差之内。
The population mean is often written "x-bar." If you have a sample with n observations, it's the summation i = 1 to n of xi/n--that's the average.
人口均值经常写成“x-条形柱”，如果你有一个样本有n个观测者，是从i=1到n和的xi/n，这是平均值。
See the sample configuration file included with the utility for detailed instructions about what the various configuration parameters mean.
有关各个配置参数的含义是什么的详细说明，请参见该实用工具包括的示例配置文件。
In contrast, the attractive men in the NCDS sample have a mean IQ of 105.00, and the unattractive men have a mean IQ of 91.39.
与之相反的是，在抽查中，有魅力的男士平均智商是105.00，没有魅力的男士平均智商是91.39。
In the NCDS sample, the attractive women have a mean IQ of 103.64, and the unattractive women have a mean IQ of 92.25.
在抽查的例子中，靓丽的女士平均智商是103.64，不靓丽的女士平均智商是92.25。
Populations, random samples. Sample statistics, moments of the sample mean and variance.
母体，随机样本。样本统计， 样本平均数和变异数的动差。
Data were pooled across studies, and relative risks for categorical outcomes and weighted mean differences for continuous outcomes, weighted according to study sample size, were calculated.
将所有的研究的数据合成，对于分类变量效应指标为风险比，对于连续型变量效应指标为加权均数差，根据研究样本的大小来加权。
Sample space order method is used to give the lower confident limits of mean life under unequal time truncations for exponent distribution.
使用样本空间排序法给出了指数分布情形下不相同定时截尾试验平均寿命置信下限的估计方法。
We can define it in a couple of different ways depending on whether we're talking about sample mean or population mean.
我们有几种不同的方式去定义这个概念，取决于我们指的是，样本均值还是总体均值。
The calculation formulas of sample size based on the error limitation are given for estimation of population mean.
对于样本均值估计总体均值，给出了基于误差限制的样本容量的计算式。
The Geometric Mean works better than the median for reporting the best middle task time for sample sizes less than 25.
对于测试样本低于25以下时，几何平均值比中位数能更好的报告最佳任务完成时间中间值。
Approximately 2.5% of the study sample reported never drinking coffee, and approximately 64% did not drink tea. The mean daily coffee consumption among drinkers was 5.7 cups.
受试者中有大约2.5%报告称从不喝咖啡，还有大约64%不喝茶。每天咖啡摄入量的均值为5.7杯。
By using the sample mean range( R )instead of standard deviation of the sample( S )in"S " method, the"R " method is obtained in this paper.
在“S”法的基础上，利用样本平均极差R代替“S”法中的样本标准差S ，从而得到了“R”法，并且给出了相应的样本大小，及各种情况下的接收标准。
More free sulfhydryls and higher sample concentration mean that one should consider using higher concentrations of reducing agent.
自由巯基数目越多，样品浓度越高，还原剂的用量就越大。
The mean shift algorithm is a nonparametric statistical method for seeking the nearest mode of a point sample distribution.
均值移位算法是一种搜索与样本点分布最相近模式的非参数统计方法。
The Six Sigma Black Belt should know that different techniques are required for analysis depending on whether a given measure (e. g., the mean) is assumed known or estimated from a sample.
6西格玛黑带应了解，根据所给量值(例如，平均值)是假设的，还是按样本估计的，在分析时需要不同的方法。
Selecting train sample on the basis of fuzzy C-mean clustering can improve accuracy of train sample, singleness of train samples can be satisfied.
在模糊c -均值聚类的基础上选择训练样本，可以提高训练样本的准确度，满足了训练样本所需的单一性原则。
This paper deals with the incomplete sample estimation of finite population mean in existing of nonrespondent sampling units.
本文讨论了存在不回答样本单位时，有限总体均值的缺损样本估计。
We give the approximation formulas of the variance of the sample ratio estimator for a population mean and its asymptotically non-biased estimator in multi-stage sampling.
讨论多阶段抽样比率估计及其样本量选择的问题，给出了比率估计抽样均方误差的近似公式及其渐近无偏估计的公式。
In particular, we focus discussion on joint confidence sets of the parameter mean and variance when a rounded sample comes from the normal distribution with both parameters unknown.
特别地，本文集中讨论当数据是来自参数未知的正态分布四舍五入后的数据，均值和方差的联合置信集。
The results show that mean square error of the estimation tends to 0 and the fidelity of the transmission state tends to 1 with the increase in the number of the sample.
研究结果表明，随着样本数的增大，估计量的均方误差趋于0，传输态的保真度趋于1。
One is to compare the sample mean and the sample variance.
当样本均值大于样本方差时，认为是服从二项分布；
The experiment reveals that composite sample strength does not mean a simple addition of reinforcing pile and soil according to their replacement proportion.
实验结果表明：复合体的竖向强度不是两种材料按一定几何比例简单叠加。
Selecting train sample on the basis of fuzzy C-mean clustering decreased subjective factor affecting selecting train sample, so higher classification accuracy can be achieved.
同时，在模糊C-均值聚类基础上选择训练样本比起直接基于真实地物图选择，减少了主观因素对训练样本选择的影响，因此取得了更高的分类精度。
Under the microscope magnifying 200,6 sections of each sample in 5 random sights were selected to conduct the semi-quantitative analysis of the mean absorbance (Am) and integral absorbance (Ai).
免疫组织化学染色片显微镜下放大200倍，每个标本取6张切片，随机取5个视野，计算免疫组织化学染色的平均吸光度值和积分吸光度值进行半定量分析。
Under the microscope magnifying 200,6 sections of each sample in 5 random sights were selected to conduct the semi-quantitative analysis of the mean absorbance (Am) and integral absorbance (Ai).
免疫组织化学染色片显微镜下放大200倍，每个标本取6张切片，随机取5个视野，计算免疫组织化学染色的平均吸光度值和积分吸光度值进行半定量分析。
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