Equations

• Crude death rate


  $\frac{deaths}{total\ population}\left(1000\right)$
• Standardised death rate


  $\frac{crude\ death\ rate}{1000}$ x standard population
• Index Number


  $\frac{current\ year}{base\ year\ }\left(100\right)$
• Weighted mean


  $\frac{\sum_{ }^{ }weight\left(amount\right)}{\sum_{ }^{ }weight}$
• Standard Population


  $\frac{people\ in\ age\ group}{total\ population}\left(1000\right)$
• Weighted Index number


  $\frac{current\ weighted\ mean}{base\ year}\left(100\right)$
• Percentage Increase


  $\frac{current\ price-base\ price}{base\ price}\left(100\right)$
• Chain Index


  $\frac{price}{last\ year}\left(100\right)$