An electrical contractor’s records during the last Inc weeks indicate the number of job limits:

  1. An electrical contractor’s records during the last Inc weeks indicate the number of job limits:
Week 1 2 3 4 S
Requests 20 22 18 21 22

 

Predict the number of requests for week 6 using each of these methods:

  1. Naiw
  2. A four-period moving average
  3. Exponential smoothing with a = 30: Inc 20 for week 2 forecast