母体，随机样本。样本统计， 样本平均数和变异数的动差。
Populations, random samples. Sample statistics, moments of the sample mean and variance.
当您试图从样本统计数据得出有关总体参数的结论时，就会出现这些解释上的困难。
These interpretive difficulties arise when you try to draw conclusions about a population parameter from a sample statistic.
区分量化（描述性的）和分析（推断性的）研究的区别； 区分总体参数和样本统计量的区别。
Distinguish between enumerative (descriptive) and analytical (inferential) studies, and distinguish between a population parameter and a sample statistic.
利用统计不定性随机变量，结合现有结构的特点，提出荷载、抗力变异性的小样本统计推断方法；
Secondly, by introducing the random variable that is statistical ambiguity, the statistics of loading and resistance of existing structure are researched.
心灵感应的辩护者指出，要求每一项研究都有令人印象深刻的证据，这忽略了一个基本的统计事实：需要大量的样本才能检测到微小的影响。
Defenders of telepathy point out that demanding impressive evidence from every study ignores one basic statistical fact: it takes large samples to detect small effects.
一个差劲的采样策略并不能产生一个我们需要的代表总体的样本，而统计管理不太可能弥补这一点。
And statistical controls are unlikely to compensate for a poor sampling strategy that does not yield a sample representative of the population to which we want to generalize.
事实上这是一个非典型的样本，不管是在抽样策略和它的组成上都是如此，而且统计管理也不能弥补这一缺陷。
This is a truly unrepresentative sample, both in sampling strategy and its make up, and statistical controls cannot compensate for this.
因此，从理论上来说，此次调查虽然伴随着大量的统计样本错误，但是仍在挑选出职业为报道员和记者的人数，无论这是否是他们真正的头衔。
So in theory this survey is picking up, with a wide range of statistical sampling error, the number of people who work as reporters and correspondents, whether or not that is their actual title.
我们应该牢记，在准备统计数据时，只考虑样本行，而不会读所有的行。
We should always remember that only the samples of the rows are considered while preparing the statistical data and not all rows are read.
两位研究员并不是调查整个统计，而是从每250人中抽取一人作为样本来研究。
Rather than looking at the whole census, the two researchers relied on a sample of one person in 250.
查看一下统计样本数量，参考班级中已经就业的毕业生比例，以及他们的工作类型。
Check the sample size, look at the percentage of the class with jobs, and look at what jobs they're getting.
有许多 推论统计步骤（根据样本数据估计总体参数的方法）可以被充分利用，但目前却没有应用它们。
An array of inferential statistical procedures (methodologies for estimating population parameters based upon sample data) could be fruitfully exploited, but at present are not being applied.
为了增加覆盖率，除了陆上电话局抽取的样本外，调查者还随意拨打了一些手机号，并把两种样本结合起来统计。
To increase coverage, this land-line sample was supplemented by respondents reached through random dialing of cellphone numbers. The two samples were then combined.
而且我们也确实不得不将这些样本汇总起来以便得到一个有效的统计结果。
And we did have to combine these samples in order to get a valid statistical result.
假设新斯科舍省啤酒消费者统计样本没有发生偏差，您现在能够得出Keiths是最受欢迎品牌这一结论吗？
Assuming that the sample of Nova Scotia beer drinkers is not biased, can you now conclude that Keith's is the most popular brand?
居民调查则是基于60000住户这么一个更小的样本，这个统计得出的数据很不固定，而且从来都不尽兴任何修正。
The household survey is based on a much smaller sample of 60,000 households which is volatile and never revised.
为了控制收集统计信息的样本集，以及可以重复使用相同的样本集，需要使用下列语句。
Example 30. To control the sample set on which the statistics will be collected and to be able to repeatedly use the same sample set, use the following.
虽然两者在统计学上的区别不是很明显，而且实验样本数量较小(只有14位病人参与该实验)，但是，研究者认为实验结果还是很有希望的。
The sample size was small; only 14 patients participated. However, researchers believe their results are promising.
塔勒布：统计学学科的基础建立在所谓大量数字的规则性上：只要你增大样本容量，没有任何单个的观测结果能损害到你的理论。
Nassim Nicholas Taleb: the field of statistics is based on something called the law of large Numbers: as you increase your sample size, no single observation is going to hurt you.
研究者承认由于实验样本数量的稀少而导致了统计学上的局限性。
The researchers acknowledged the statistical limitations of the study due to the small sample size.
由于样本空间比较小不具备统计学意义，但是目前它识别的准确率已经达到了80%~90%。
The sample size was too small to be statistically significant, but it was accurate about 80 to 90 percent of the time.
如果样本人群具有统计学上的代表性，那么根据理论这种方式将会表达人群的真实想法。
If the samples are statistically representative, that should, so goes the theory, give a credible picture of what the entire population would think, were it as well-informed.
统计有效性——样本的范围够不够大？其结果是不是做过大规模的统计分析？
Statistical validity - Is the sample size big enough, and are the results ‘statistically significant’?
尽管所有的结构在统计学上有显著性的差异，但试验样本还是不够大到获得双边差异。
Still, while the overall results were statistically significant, the study was not large enough to attain statistical significance in each of its separate arms.
因此，他将这些家庭样本与样本数较大的国家统计局进行的官方家庭调查进行比对。
He therefore had to match his sample of families with the much bigger sample in the official household survey carried out by the National Bureau of Statistics.
但是，研究者强调说，这些研究都处于起步阶段，分析中自闭症和母体因素之间的关系还没有达到统计意义上的显著性水平，这些研究没有考虑到样本的权重。
The researchers stressed, however, that the findings were preliminary and that the association did not reach statistical significance in an analysis where they did not apply the sampling weights.
应该指出，数理统计的结果具有一定的代表性，但是这一结果受到样本的数目和质量的控制。
It should be pointed out that the results of mathematical statistics have a certain representation, but it is restricted by the quantity and quality of samples.
组织应当建立验证计划，包括方法、接受标准、如果可以，样本大小的统计技术。（新增）
The organization shall document verification plans that include methods, acceptance criteria and, as appropriate, statistical techniques with rationale for sample size.
组织应当建立验证计划，包括方法、接受标准、如果可以，样本大小的统计技术。（新增）
The organization shall document verification plans that include methods, acceptance criteria and, as appropriate, statistical techniques with rationale for sample size.
应用推荐