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...
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 ...
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...
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...
Rev.F07http://faculty.valenciacc.edu/ashaw/1Rev.F081STA2023Module8TheSamplingDistributionoftheSampleMeanRev.F082ModuleObjectivesInthismodule,wewilllearnthefollowing:1.Definesamplingerrorandexplaintheneedforsamplingdistributions.2.Findthemeanandstandarddeviationofthevariable,giventhemeanandstandarddeviationofthe...
7.3 The Sampling Distribution of the Sample Mean population:1000;Scale are normally distributed with mean 100 and standard deviation 16 sample:4;可以得到样本均值的分布图如下: 与通过公式计算得到的mean 和 标准差一致:μx¯ = μ = 100 and σx¯ = σ/√n = 16/√4 = 8; ...
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 ...
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 variance of the sampling distribution of the mean is computed as follows:That is, the variance of the sampling distribution of the mean is the population variance divided by N, the sample size (the number of scores used to compute a mean). Thus, the larger the sample size, the ...
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 ...