Two examples.

In this section, we consider two examples of time series:

(A)

The average monthly temperatures in Nottingham, England from Jan., 1920, to Dec., 1939. These data are computed (I believe) by taking the daily highs and lows, averaging those two numbers, and then taking these daily ``average'' temperatures and averaging over the entire month (so between 28 and 31 daily averages are averaged). This series is referred to as nottem.

(B)

The estimated number of housing starts within the U.S. from Jan., 1966 to Dec., 1974. This series is referred to as hstart.