Weekly Sales of Copy Paper at Cubicle Suppliers Are in the Table

question 70

Essay

Weekly sales of copy paper at Cubicle Suppliers are in the table below. Compute a three-period moving average and a four-period moving average for weeks 5, 6, and 7. Compute MAD for each forecast. Which model is more accurate? Forecast week 8 with the more accurate method.
Week Sales (cases)
1 17
2 21
3 27
4 31
5 19
6 17
7 21

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Definitions:

Oligopolies

Market structures characterized by a small number of firms dominating the market, where each firm has significant market power and decisions of one firm influence others.

Interindustry Competition

Competition that occurs between firms in different industries, as opposed to intra-industry competition within the same industry.

Economies of Scale

Cost advantages reaped by companies when production becomes efficient, as the scale of operation increases.

Herfindahl Index

A measure of market concentration, calculated as the sum of the squares of the market shares of all firms within the industry.