Statistics 简明教程

Statistics - Sample Planning

样本规划指的是需要采取的测量详细大纲：

Sample planning refers to a detailed outline of measurements to be taken:

  1. At what time - Decide the time when a survey is to be conducted. For example, taking people views on newspaper outreach before launch of a new newspaper in the area.

  2. On Which material - Decide the material on which the survey is to be conducted. It could be a online poll or paper based checklist.

  3. In what manner - Decide the sampling methods which will be used to choose people on whom the survey is to be conducted.

  4. By whom - Decide the person(s) who has to collect the observations.

抽样计划应该以正确代表感兴趣的代表性样本并允许回答所有问题的方式制定。

Sampling plans should be prepared in such a way that the result correctly represent the representative sample of interest and allows all questions to be answered.

Steps

以下是样本规划涉及的步骤。

Following are the steps involved in sample planning.

  1. Identification of parameters - Identify the attributes/ parameters to be measured. Identify the ranges, possible values and required resolution.

  2. Choose Sampling Method - Choose a sampling method with details like how and when samples are to be identified.

  3. Select Sample Size - Select an appropriate sample size to represent the population correctly. Large samples are generally proner to invalid conclusion.

  4. Select storage formats - Choose a data storage format in which the sampled data is to be kept.

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  1. Assign Roles - Assign roles and responsibilities to each person involved in collecting, processing, statistically testing steps.

  2. Verify and execute - Sampling plan should be verifiable. Once verified, pass it to related parties to execute it.