Time Series (Program 6)

1. Cycles and Trends
2. Seasonal trends
3. Smoothing
4. Interpreting plots

Commuting time to work.
Control chart-determines if data is stable, or in control. Control limits=2SDs

1. Body's physiological cycles-sheild from external light; internal clock
   • body temperature: cyclic, periodic
   • bright light therapy

2. Seasonal trends -economic statistics, ozone levels

3. Smoothing
   -running times, running median
   • read surprising sentences and examine response
   • New York Stock Exchange: is there a cycle or not?

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