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...
当我们可以抽取无限多个样本时,分布将会是一个完美的钟形,均值是精确的 1.22 毫米,跟总体均值一样。我们把这种分布称为样本均值的抽样分布(sampling distribution of the sample mean),它是这样一种分布:你从总体中无限抽取样本,计算所有样本的均值。 目前为止,你应当意识到,在实际的研究中,我们不可能从某个总体中...
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...
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...
For the sampling distribution of sample means, what is the relationship between the population mean and the mean of all possible sample means of size 25?? They are different by one standard error of the mean.They are not equal.They are both normally distributed.They are equal. 相关知识点: ...
According to the central limit theorem, a sampling distribution of the sample mean will be approximately normal only if the: A: sample size n is large B:variance of the underlying distribution is known C:population mean of the underlying distribution is known 相关知识点: 试题来源: 解析 A ...
A. normally distributed with mean m and variance s 2 B. normally distributed with mean m and variance s 2 . C. distributed as a t distribution with variance 1. D. normally distributed with mean 0 and variance 1 E. None of the above相关...
AP统计学中的两个公式问题在Princeton的书中有一个Sampling Distribution of a Sample Proportion和Sampling Distribution of a Sample Mean,他们的方差公式是不一样的.这两个有什么区别吗?为什么他们的方差公式不一样. 答案 样本比例的抽样分布 和 样本均值的抽样分布 怎么能一样呢?一个是比例 一个是均值 算法都...
AP统计学中的两个公式问题在Princeton的书中有一个Sampling Distribution of a Sample Proportion和Sampling Distribution of a Sample Mean,他们的方差公式是不一样的.这两个有什么区别吗?为什么他们的方差公式不
X Distribution of Sample Mean • Because the sample mean is a random variable – The sample mean has a probability distribution – We can obtain the center and spread of the probability distribution of the sample mean • This is called the distribution of the sample mean • Because the ...