Loading

Module 1: Calculating a seasonal index

Notes
Study Reminders
Support
Text Version

Deseasonalising the data

Set your study reminders

We will email you at these times to remind you to study.
  • Monday

    -

    7am

    +

    Tuesday

    -

    7am

    +

    Wednesday

    -

    7am

    +

    Thursday

    -

    7am

    +

    Friday

    -

    7am

    +

    Saturday

    -

    7am

    +

    Sunday

    -

    7am

    +

XSIQ
*

Core Mathematics - Deseasonalising the data

Deseasonalising the data

Data can be deseasonalised using seasonal indices. If this is done then
underlying trends, masked by seasonal patterns, can be revealed. A high
seasonal index for Q1 indicates that in this season sales are normally
above the annual average. If we divide by the seasonal index in that case
we will reduce the actual sales value and hence smooth out the fluctuation
caused by that peak. The value obtained is called the deseasonalised value.


We can then calculate the deseasonalised sales figure by dividing the
actual figure by its corresponding seasonal index.

Previous | Next