Unemployment rate in the USA
Contrast seasonal patterns (that repeat in regular periods such as every 12 months) and cyclical patterns whose periods are less regular — e.g. the 'business cycle' is usually between 3 and 10 years.
The example is monthly but there is no noticeable 12-month seasonal pattern.
State that the AR(1) model can be used to obtain forecasts.
The data set shows monthly civilian unemployment rate in the USA between 1970 and 1999.