Question: Question (3): Answer the following problem The table below shows the actual demand for mobiles shop for the last 7 periods. Period 1 2 3

Question (3): Answer the following problem

The table below shows the actual demand for mobiles shop for the last 7 periods.

Period

1

2

3

4

5

6

7

8

Actual

demand

300

315

290

345

320

360

375

Determine forecast for periods 7 and 8 on the bases of:

  • 2-period moving average (2 marks)
  • 4-period moving average (2 marks)
  • 2-period weighted moving average with (t-1) weighted 0.6 and (t-2) weighted 0.4. (2 marks)
  • Exponential smoothing with alpha=0.2 and the period 6 forecast being 375

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