STATISTICS FROM A TO Z<br />-- CONFUSING CONCEPTS CLARIFIED
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Statistics Tip of  the Week: Simple Non-linear Regression fits a curve to non-linear x,y data.

8/22/2017

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The "Simple" means that there is only one x variable. y = f(x). So the curve exists in two dimension and can be plotted on screen or sheet of paper. The "non-linear" means that, when we graph the data, it does not roughly follow a straight line, so we must look for an appropriate curve.

The following are probably the most common non-linear curves used:
Picture
Exponential and Logarithmic curves have rapid accelerations or decelerations
in the slope. Power curves have a more gradual change. Polynomial functions
can be used for more complex curves, which change direction, as shown in our Tip of the Week for May 17, 2017 
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    Andrew A. (Andy) Jawlik is the author of the book, Statistics from A to Z -- Confusing Concepts Clarified, published by Wiley.

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  • Home
    • Why This Book Is Needed
    • Articles List, Additional Concepts
    • Examples: 1-Page Summaries
    • Examples: Concept Flow Diagram
    • Examples: Compare and Contrast Tables
    • Examples: Cartoons
    • Example: Which to Use When Article
  • Buy
  • Blog
  • Sample Articles
  • Videos
  • Author
  • Communicate
  • Files
  • Errata