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    Head First Data Analysis
    Dedication
    A Note Regarding Supplemental Files
    Advance Praise for Head First Data Analysis
    Praise for other Head First books
    Author of Head First Data Analysis
    How to Use This Book: Intro
    1. Introduction to Data Analysis: Break it down
    2. Experiments: Test your theories
    3. Optimization: Take it to the max
    4. Data Visualization: Pictures make you smarter
    5. Hypothesis Testing: Say it ain’t so
    6. Bayesian Statistics: Get past first base
    7. Subjective Probabilities: Numerical belief
    8. Heuristics: Analyze like a human
    LitterGitters submitted their report to the city council
    The LitterGitters have really cleaned up this town
    The LitterGitters have been measuring their campaign’s effectiveness
    The mandate is to reduce the tonnage of litter
    Tonnage is unfeasible to measure
    Give people a hard question, and they’ll answer an easier one instead
    Littering in Dataville is a complex system
    You can’t build and implement a unified litter-measuring model
    Heuristics are a middle ground between going with your gut and optimization
    Use a fast and frugal tree
    Is there a simpler way to assess LitterGitters’ success?
    Stereotypes are heuristics
    Your analysis is ready to present
    Looks like your analysis impressed the city council members
    9. Histograms: The shape of numbers
    10. Regression: Prediction
    11. Error: Err Well
    12. Relational Databases: Can you relate?
    13. Cleaning Data: Impose order
    A. Leftovers: The Top Ten Things (we didn’t cover)
    B. Install R: Start R up!
    C. Install Excel Analysis Tools: The ToolPak
    Index
    About the Author
    Copyright
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    8. Heuristics: Analyze like a human > Your analysis is ready to present

    Your analysis is ready to present

    Between your heuristic and the data you have, including the just-received responses from the sanitation workers below, you’re ready to start explaining what you see to the city council.

    image with no caption

    Sharpen your pencil

    Answer the following questions from the city council about your work with LitterGitters.

    Why can’t you measure tonnage directly?

    ________________________________________________________________

    ________________________________________________________________

    ________________________________________________________________

    Can you prove that the campaign had an effect?

    ________________________________________________________________

    ________________________________________________________________

    ________________________________________________________________


      

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