Question: An electrical contractor's records during the last five weeks indicate the number of job requests: week 1 , 2, 3, 4, 5 request 20,22,18 ,21,21

An electrical contractor's records during the last five weeks indicate the number of job requests:

week 1 , 2, 3, 4, 5

request 20,22,18 ,21,21

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

(a) Naive
(b) A Four-period moving average
(c) Weighted moving average using 0.50 for week 5, 0.30 for week 4, and 0.20 for week 3.

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