Time Series

A time series is the name given to the values of some statistical variable measured over a uniform set of time points.

The following are examples of time series:

• Output at a factory each day for the last month
• Monthly sales over the last two years
• Total annual costs for the last ten years
• The retail prices index each month for the last ten years
• The number of people employed by a company each year for the last 20 years.