A time-series data shows information about the same subject or element of a sample or population for different periods of time.
The information below is not based on real statistical data, but it can help us understand what we mean by time-series data.
|Year||Number of cars rented by Alamo|
As you can see, the information is about the same subject that is Alamo.
Furthermore, the information is given for different time period. Notice that a time-series data could also be compiled by using month as a time frame instead of year.
For instance, you could compile information from January to December.