Question: 17

In the nine months since new parking regulations were introduced the numbers of vehicles impounded by a city highways department were:

Month: 1 2 3 4 5 6 7 8 9

Vehicles: 207 246 195 233 218 289 248 292 276

A) Apply the exponential smoothing model with an alpha value of 0.5 to predict values of the series to the tenth month.

B) Portray the actual values and the forecasts on the same graph.

C) Work out the mean squared deviation ( MSD) for the model.