Seasonal Indices (VCE SSCE General Mathematics): Flashcards

Numbers showing how a period compares to average

The average equals 1

Number of time periods

Period is above average

Period is below average

$\text{Actual} \div \text{SI}$

$\text{Deseasonalised} \times \text{SI}$

$\text{Period value} \div \text{Average}$

Reveal underlying trend without seasonal fluctuations

26% above average