AP Stats Nationals Review. Data: Quantitative (Histogram, Stem & Leaf, Boxplots) versus Categorical (Bar or Pie Chart) Boxplots: 5 Number Summary, IQR,

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Presentation transcript:

AP Stats Nationals Review

Data: Quantitative (Histogram, Stem & Leaf, Boxplots) versus Categorical (Bar or Pie Chart) Boxplots: 5 Number Summary, IQR, Outliers???, Comparisons Center, Shape & Spread! For Skewed Data use…median & IQR For Symmetric data use…mean & SD Normal Model ( ), SD & z-scores

Scatterplots ~ direction, form & scatter – Variables: explanatory & response – Correlation: r, r-squared, strength & direction. Z-score world versus slope. Linear Model ~ equation, interpretation, residuals Problems – Extrapolation, lurking variables – Outliers & influential points/leverage Re-Expression & Ladder of Powers

M.C. Tips Underline key words Write out your procedure Don’t Rush Balance your time (2-3 min per ???)

F.R. Tips Do easier ???’s first Answer the ??? Asked (underline) If miss 1 part, answer a part you know Inference: Conditions/Mechanics/Conclusion Be concise Verify conditions (not just a checklist) 2 decimal places for z-scores, 4 for p-values Context is King!!!