using graphs for information extraction gasoline consumption example jan 12, 2010stat 1001
DESCRIPTION
Jan 12, 2010STAT 1003 Theory of Smoothing Smoothing amplifies signal but introduces bias by cutting off peaks and valleysTRANSCRIPT
Using Graphs for Information Extraction
Gasoline Consumption Example
Jan 12, 2010 STAT 100 1
Jan 12, 2010 STAT 100 2
Gasoline Consumption
Each Fill - record kms and litres of fuel used
Smooth--->SeasonalPattern
Jan 12, 2010 STAT 100 3
Theory of Smoothing
Smoothing amplifies signal but introduces bias
by cutting off peaks and valleys
Jan 12, 2010 STAT 100 4
Illustration of Effect – Artificial Data
Jan 12, 2010 STAT 100 5
Intro to smoothing with context …
Jan 12, 2010 STAT 100 6
Suggests follow-up
1. How do you choose the amount of smoothing to produce useful information?
2. Why does a seasonal pattern occur?