Sales of Volkswagen's popular Beetle have grown steadily at auto dealerships in Nevada during the past 5 years (see table below).
|
Year
|
Sales
|
|
1
|
455
|
|
2
|
502
|
|
3
|
516
|
|
4
|
570
|
|
5
|
580
|
a) Forecasted sales for year 6 using a 3-year moving average is sales (round your response to one decimal place).
b) The MAD for a 3-year moving average based forecast is sales (round your response to one decimal place).
c) The MSE for a 3-year moving average based forecast is [Q sales (round your response to the nearest whole number).