Aggregate Forecasts Are Usually More Accurate Than Disaggregate Forecasts Because

Multiple Choice

Aggregate forecasts are usually more accurate than disaggregate forecasts because

A) aggregate forecasts tend to have a larger standard deviation of error relative to the mean.
B) aggregate forecasts tend to have a smaller standard deviation of error relative to the mean.
C) disaggregate forecasts tend to have a smaller standard deviation of error relative to the mean.
D) disaggregate forecasts tend to have less standard deviation of error relative to the mean.
E) none of the above