The aggregate forecast must be more precise than the projection of each individual. To demonstrate this, calculate the coefficient of determination (CV) in the single projections as well as contrast it to the collective prediction (the CV for the individual forecasts is between 10 percent and 14 percent, and the CV for the aggregate forecast is less than 6 percent).
A fundamental assumption here is that the projections at each institution are independent and unbiased. Forecasts are continually susceptible to change and therefore are frequently inaccurate. To reduce forecasting errors,aggregate demand prediction of several sweaters will be employed. The accuracy of the estimate will be affected if you try and figure out the need for every single school.
An aggregate demand estimate would be more reliable than estimating demand for each particular school. This is because, as a consequence of outliers being canceled out, the variation of aggregated prediction is significantly less than the variation of a single prediction.
A decrease in variability as a result of consumer spending leads toward the optimum value being ordered, which is the purpose.