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can someone please solve this problem for me with explanation Forecast the number of iPhones to be sold for the time period 24 through 27 using

can someone please solve this problem for me with explanation 

  1. Forecast the number of iPhones to be sold for the time period 24 through 27 using weighted  moving average.

 

a. Plot the iphone sales data.

b. Forecast using two months weighted moving average technique. Use weight 0.7 for the most recent period and 0.3 for the preceding period.

c. Forecast another set using three months weighted moving average, the weight are 0.5, 0.3 and 0.2 from the most recent to the oldest respectively.

d. Plot the sales data along with data for two forecasts in b and c.

e. What's your observation on use of various weights? Comment on forecast accuracy from the plot.


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