A) Plot the Above Data on a Graph

question 28

Short Answer

$$\begin{array} { | c | c | } \hline \text { Year } & \text { Demand } \\\hline 1 & 7 \\\hline 2 & 9 \\\hline 3 & 5 \\\hline 4 & 9 \\\hline 5 & 13 \\\hline 6 & 8 \\\hline 7 & 12 \\\hline 8 & 13 \\\hline 9 & 9 \\\hline 10 & 11 \\\hline 11 & 7 \\\hline\end{array}$$ A) Plot the above data on a graph. Do you observe any trend, cycles, or random variations?
B) Starting from year 4 and going to year 12, forecast demand using a 3-year moving average. Plot your forecast on the same graph as the original data.
C) Starting from year 4 and going to year 12, forecast demand using a 3-year moving average with weights 0.1, 0.3 and 0.6 ( use 0.6 for the most recent year). Plot your forecast on same graph.
D) As you compare forecasts with original data, which seems to give better results?

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