Week 9.1. **有意**的資料收集

沿著假設檢定的介紹，我們來談一下它的上源，資料。

• 無心的資料收集
• 有心的資料收集: 好心 與 不好心/壞心;
  • Sampling/Reasoning towards a foregone solution
  • Multiplicity problem
• 有（好）心資料資料收集: Basics of sampling survey
  • Simple random sampling: the measurements in the population are homogeneous
  • Stratified random sampling: Homogeneous within stratum, heterogeneous between strata
  • Cluster sampling: Heterogeneous within cluster (as heterg. as the population itself)
    and homogeneous among clusters.
    Keyword: Homogeneous, heterogeneous