Centred Moving Averages and Linear Trend Lines

What this note covers

1. What Is a Time Series and Why Do We Smooth It?
2. Odd-Period Moving Averages
3. Even-Period Moving Averages and Centring
4. Plotting Smoothed Data
5. Fitting a Least-Squares Linear Trend Line to the Smoothed Data
6. Interpreting the Trend Line and Assessing the Model
7. Examination Technique and Common Calculation Checks

7 sections · 14 key terms & formulas · 6 common mistakes