9.

Which would not generally be considered a feature common to all forecasts?

Select one:

a.

Historical data is available on which to base the forecast.

b.

An assumption of a stable underlying causal system.

c.

Accuracy decreases as the time horizon increases.

d.

Forecasts for groups of items tend to be more accurate than forecasts for individual items.

e.

Actual results will differ somewhat from predicted values.