Problem $36$: $(1$ point$)$

Forecasts and actual sales of digital music players at Just Say Music are as follows:

Month Forecast Actual Sales

March $150170$

April $220229$

May $205192$

June $256241$

July $250238$

August $260210$

September $270225$

October $280179$

image.png

Plot the data and provide insights about the time series. $(0\mathrm{.}5$ points$)$

What is the forecast for November, using a two$-$period moving average? $(0\mathrm{.}25$ points$)$

What is the forecast for November, using a three$-$period moving average? $(0\mathrm{.}25$ points$)$