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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
    Acme Cosmetics needs your help
    The CEO wants data analysis to help increase sales
    Data analysis is careful thinking about evidence
    Define the problem
    Your client will help you define your problem
    Acme’s CEO has some feedback for you
    Break the problem and data into smaller pieces
    Now take another look at what you know
    Evaluate the pieces
    Analysis begins when you insert yourself
    Make a recommendation
    Your report is ready
    The CEO likes your work
    An article just came across the wire
    You let the CEO’s beliefs take you down the wrong path
    Your assumptions and beliefs about the world are your mental model
    Your statistical model depends on your mental model
    Mental models should always include what you don’t know
    The CEO tells you what he doesn’t know
    Acme just sent you a huge list of raw data
    Time to drill further into the data
    General American Wholesalers confirms your impression
    Here’s what you did
    Your analysis led your client to a brilliant decision
    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
    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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    Help

    The CEO likes your work

    Your report is concise, professional, and direct.

    It speaks to the CEO’s needs in a way that’s even clearer than his own way of describing them.

    You looked at the data, got greater clarity from the CEO, compared his beliefs to your own interpretation of his data, and recommended a decision.

    Nice work!

    image with no caption

    How will your recommendation affect Acme’s business?

    Will Acme’s sales increase?


      

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