# The Median-Median Line

Document Sample

The Median-Median Line
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).
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.
Wave Data
The Wave
30
27
24

Time in Seconds
21
18
15
12
9
6
3

2   4   6    8 10 12 14 16 18 20 22 24
Number of People
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).
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.

DOCUMENT INFO
Shared By:
Categories:
Stats:
 views: 88 posted: 8/29/2010 language: English pages: 7
How are you planning on using Docstoc?