1
GATE ME 2008
+2
-0.6
A moving average system is used for forecasting weekly demand. $${F_1}\left( t \right)$$ and $${F_2}\left( t \right)$$ are sequences of forecasts with parameters $${m_1}$$ and $${m_2}$$, respectively, where $${m_1}$$ and $${m_2}\left( {{m_1} > {m_2}} \right)$$ denote the numbers of weeks over which the moving averages are taken. The actual demand shows a step increase from $${d_1}$$ to $${d_2}$$ at a certain time. Subsequently,
A
neither $${F_1}\left( t \right)$$ nor $${F_2}\left( t \right)$$ will catch up with the value $${d_2}$$
B
both sequences $${F_1}\left( t \right)$$ and $${F_2}\left( t \right)$$ will reach $${d_2}$$ in the same period
C
$${F_1}\left( t \right)$$ will attain the value $${d_2}$$
D
$${F_2}\left( t \right)$$ will attain the value $${d_2}$$
2
GATE ME 2005
+2
-0.6
The sales of a product during the last four years were $$860, 880, 870$$ and $$890$$ units. The forecast for the fourth year was $$876$$ units. If the forecast for the fifth year, using simple exponential smoothing, is equal to the forecast using a three period moving average, the value of the exponential smoothing constant $$\alpha$$ is
A
$${1 \over 7}$$
B
$${1 \over 5}$$
C
$${2 \over 7}$$
D
$${2 \over 5}$$
3
GATE ME 2003
+2
-0.6
The sale of cycles in a shop in four consecutive months are given as $$70, 68, 82 95.$$ Exponentially smoothing average method with a smoothing factor of $$0.4$$ is used in forecasting. The expected number of sales in the next month is
A
$$59$$
B
$$72$$
C
$$86$$
D
$$136$$
4
GATE ME 2000
+2
-0.6
In a time series forecasting model, the demand for five time periods was $$10, 13,$$ $$15,$$ $$18$$ and $$22.$$ A linear regression fit resulted in an equation $$F = 6.9 + 2.9$$ $$t$$ where $$F$$ is the forecast for period $$t$$. The sum of absolute deviations for the five data is
A
$$2.2$$
B
$$0.2$$
C
$$-1.2$$
D
$$24.3$$
GATE ME Subjects
Engineering Mechanics
Strength of Materials
Theory of Machines
Engineering Mathematics
Machine Design
Fluid Mechanics
Turbo Machinery
Heat Transfer
Thermodynamics
Production Engineering
Industrial Engineering
General Aptitude
EXAM MAP
Joint Entrance Examination