Problem statement: What is the forecast for the Period 7 using a 3-period weighted moving average technique (use a weight of 3 for last period's value, a weight of 2 for the period before, and a weight of 1 for the period before that), given the following time-series data for six past periods?
Period 1 2 3 4 5 6
Value 136 126 146 148 156 164
126.50
156.67
158.67
148.07
164.00