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The Median-Median Line

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The Median-Median Line

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  1. The Median-Median Line

  2. Process • Sort the collected data by the independent variable. • Divide the sorted data into three groups. • Find the median x and the median y of each group. • Find the equation of the line that passes through (x1, y1) and (x3, y3).

  3. Process • Find the equation of the line parallel to the previous line that passes through (x2, y2). • Find the weighted average of the y-intercepts. b=(b1+b2+b1)/3 • The median-median line is the line parallel to the previous two lines with the weighted y-intercept.

  4. Wave Data

  5. Process • Sort the collected data by the independent variable. • Divide the sorted data into three groups. • Find the median x and the median y of each group. • Find the equation of the line that passes through (x1, y1) and (x3, y3).

  6. Process • Find the equation of the line parallel to the previous line that passes through (x2, y2). • Find the weighted average of the y-intercepts. b=(b1+b2+b1)/3 • The median-median line is the line parallel to the previous two lines with the weighted y-intercept.