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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
    New Army needs to optimize their website
    The results are in, but the information designer is out
    The last information designer submitted these three infographics
    What data is behind the visualizations?
    Show the data!
    Here’s some unsolicited advice from the last designer
    Too much data is never your problem
    Making the data pretty isn’t your problem either
    Data visualization is all about making the right comparisons
    Your visualization is already more useful than the rejected ones
    Use scatterplots to explore causes
    The best visualizations are highly multivariate
    Show more variables by looking at charts together
    The visualization is great, but the web guru’s not satisfied yet
    Good visual designs help you think about causes
    The experiment designers weigh in
    The experiment designers have some hypotheses of their own
    The client is pleased with your work
    Orders are coming in from everywhere!
    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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    4. Data Visualization: Pictures make you... > Orders are coming in from everywhere...

    Orders are coming in from everywhere!

    Because of the new website, traffic is greater than ever. Your visualization of the experimental results showed what they needed to know to spruce up their website.

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    Even better, New Army has embarked on a continuous program of experimentation to fine-tune their new design, using your visualization to see what works. Nice job!

    image with no caption