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...
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...
Distribution of Sample Mean Overview • A new sample mean can be calculated each time a new sample is taken • In this way, the sample mean can be analyzed as a random variable • Being able to calculate (approximately) the distribution of the sample mean is a critical tool for ...
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...
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
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 ...
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 ...
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. 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 样本比例的抽样分布 和 样本均值的抽样分布 怎么能...
The sampling distribution of the sample mean isA.normally distributed with mean m and variance s 2B.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 1E.No