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Penny Williams,

Penny Williams, an experienced AP Statistics teacher since 1999, offers guidance on distinguishing between concepts such as Stratify vs. Block, Cluster vs. Multistage, Confounding vs. Lurking Factor vs. Treatment, Non-Response vs. Undercoverage, Non-Response Bias vs. Response Bias, and Random Assignment vs. Random Selection in Inference about population vs. Inference about cause & effect in Designing Studies (Producing Data).

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Penny Williams,

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  1. Penny Williams, Acorn :) Richmond Hill, GA (near Savannah) New Reader, but not New Teacher Teaching AP Statistics since 1999-2000 school year

  2. Blockification?? For your unit on Designing Studies or Producing Data

  3. Do your students have trouble distinguishing between Stratify vs. Block Stratify vs. Cluster Stratify vs. Multistage Confounding vs. Lurking Factor vs. Treatment Non-Response vs. Undercoverage Non-Response Bias vs. Response Bias Random Assignment vs. Random Selection Inference about population vs. Inference about cause & effect

  4. Designing Studies(Producing Data)

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