mean v.[T] 1.(词语等)表示...的意思,作...解释 2. 意指,意谓 3. 意味着,即是 4. 意欲,打算;怀有 5. 预定;注定;指定 6. 引起,造成 v.[I] 1. 怀 distribution n. 1.分发,分配 2.散布,分布 3.分配;分布 4.(商品)运销,经销,分销 5.按比例分配;分配法;分发方式 6.分配物,配给物;分...
example: 统计每户房子占有人数:可知该变量属于右偏分布: household size is far from being normally distributed; it is right skewed. Nonetheless, according to the central limit theorem, the samplingdistribution of the sample mean can be approximated by a normal distribution whenthe sample size is relat...
mean=平均值 proportion=比例 sampling distribution of the sample mean 样本均值抽样分布 样本均值的抽样分布即所有样本均值的可能取值形成的概率分布。例如，某高校大一年级参加英语四级考试的人数为6000人，为了研究这6000人的平均考分，欲从中随机抽取500人组成样本进行观察。若逐一抽取全部可能样本，并计算...
distribution of a sample statistic is often called a sampling distribution. So, the distribution of the sample mean is also called sampling distribution of the mean. Example 1 1) Calculate the mean and standard deviation of the population. 2) Make a list of all samples of size 2 ...
We begin by establishing a fundamental fact about any normal distribution: about 95% of the probability lies within 2 SD of the mean. If we integrate the area under these curves, between 2 SD below the mean and 2 SD above the mean, we find the following areas, which correspond to the ...
Define the sampling distribution of a mean. Define the sampling distribution of the mean. Define sampling and sampling distribution. Define a sampling distribution. What is the sampling distribution of means created from? If you take a sample of size 35, can you say what the shape of the d...
《6.2 Sampling Distribution of Sample Mean》 (提示:如果视频分为多个小段,请下载后用视频合并软件合并。) 序号选择视频教程名称大小操作 16.2 Sampling Distribution of Sample Mean79.91 M下载 外唐网视频教程合并软件下载地址: http://www.waitang.com/upload/flvtool.zip...
Step 1:Identify the size of the samples, {eq}N {/eq}, and the variance of the population. Remember that the population variance, {eq}\sigma^2 {/eq}, is the population standard deviation squared. Step 2:Calculate the variance of the sampling distribution of a sample mean u...
sampling distribution of sample mean样本平均值的抽样分布 distribution of mean of sample样本均值的分布 sample for buyer's sample买方销售用样品 系买方为争取销售时效,而于契约中与卖方约定在货物装运前,尽快提供若干样品,或从即将运出的商品中抽取若干数量,迅速供其推销;这种样品若未及时送达,很可能影响销售机会...
The sampling distribution of the sample mean is close to the normal distribution(A) only if both the original population has a normal distribution and n is large.(B) if the standard deviation of the original population is known.(C) if n is large, no matter what the distribution of the ...