题目
The best approach for creating a stratified random sample of a population involves:
选项
A.drawing an equal number of simple random samples from each subpopulation.
B.selecting every kth member of the population until the desired sample size is reached.
C.drawing simple random samples from each subpopulation in sizes proportional to the relative size of each subpopulation.
答案
C
解析
C is correct. Stratified random sampling involves dividing a population into subpopulations based on one or more classification criteria. Then, simple random samples are drawn from each subpopulation in sizes proportional to the relative size of each subpopulation. These samples are then pooled to form a stratified random sample.C是正确的。分层随机抽样包括根据一个或多个分类标准将一个群体划分为若干子群体。然后，从每个子群体中抽取与每个子群体的相对大小成比例的简单随机样本。然后将这些样本合并形成分层随机样本。