1. 12 Further mathematics
Seasonal Indicies

2. Seasonal Indicies

3. Seasonal Indicies

4. Seasonal Indicies

5. Seasonal Indicies

6. Seasonal Indicies

7. Seasonal Indicies

8. Seasonal Indicies
Two things to be noticed are that deseasonalising has:
removed the seasonality from the time series plot
revealed a clear underlying trend in the data.
It is common to deseasonalise time series data before you fit a trend line.

9. Seasonal Indicies

10. Seasonal Indicies

11. Seasonal Indicies

12. Seasonal Indicies

13. Seasonal Indicies

14. Seasonal Indicies

15. Exercise 6D Even Numbered Questions
WORK TO BE COMPLETED
Exercise 6D Even Numbered Questions