Q1) Table lists number (in millions) of Chevrolet passenger cars sold to dealers in the U.S. and Canada from 1980 to 1985.
|
Year
|
Sales
|
|
1980
|
1.740
|
|
1981
|
1.444
|
|
1982
|
0.896
|
|
1983
|
1.289
|
|
1984
|
1.455
|
|
1985
|
4.882
|
Q2) Using exponential smoothing technique to data from 1980 to 1985, predict number of Chevrolet passenger cars sold to U.S. and Canadian dealers in 1985 using w = .3.
a) 2.448 million cars.
b) 3.834 million cars.
c) 4.882 million cars.
d) 3.427 million cars.
Q3) Using exponential smoothing technique to data from 1980 to 1985, predict the number of Chevrolet passenger cars to be sold to U.S. and Canadian dealers in 1985 using w = .7.
a) 3.834 million cars.
b) 4.882 million cars.
c) 2.448 million cars.
d) 3.427 million cars.
Q4) Consider actual values Y and predict values F given in table below.
|
Time Period
|
Y
|
F
|
|
1
|
19.5
|
19.3
|
|
2
|
21.5
|
20.9
|
|
3
|
22.6
|
22.5
|
Compute mean absolute deviation (MAD) of the forecasts.
a) 0.30
b) 0.37
c) 1.42
d) 0.90
Consider actual values Y and predict values F given in table below.
|
Time Period
|
Y
|
F
|
|
1
|
19.5
|
19.3
|
|
2
|
21.5
|
20.9
|
|
3
|
22.6
|
22.5
|
Compute mean absolute percentage error (MAPE) of the forecasts.
a) 0.90
b) 0.37
c) 0.30
d) 1.42