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Online Tests
Statistics Ics Part 2 Chapter 7 Online Test MCQs With Answers
Question # 1
The straight line is fitted to a time series when the movements in the time series are
Choose an answer
linear
quadratic
cubic
constant
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Question # 2
The equation of the quadratic (parabolic) trend is
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ŷ=a+bx
ŷ=a+by
ŷ=a+bΣx+cΣx
2
ŷ=a+bx+cx
2
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Question # 3
The unsystematic sequence which follows irregular pattern of variations is called:
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Noise
Signal
Linear
Non-linear
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Question # 4
The trend values in freehand curve method are obtained by:
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Equation of straight line
Second degree parabola
Signal
Graph
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Question # 5
In the measurement of secular trend the moving averages:
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Give the trend in a straight line
Measure the seasonal variations
Smooth out a time series
None of these
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Question # 6
Sum of squares of residuals is denoted by
Choose an answer
∑
e
∑
e
2
∑
e
3
∑
e
4
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Question # 7
The multiplicative time series model is:
Choose an answer
Y = T + S + C + I
TSCI
Y = a + bX
Y = a + bX + cX
2
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Question # 8
The secular trend is measured by the method of semi-averages when:
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Time series contains yearly value
Trend is linear
Time series contains odd number of values
None of them
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Question # 9
The elimination or addition of a few more time periods may change its
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speed
value
direction
none of these
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Question # 10
In time series seasonal variations can occur within a period of:
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Nine years
Four Years
Three years
One year
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Question # 11
For a least squares linear trend Y = a + bx, the Σ(Y - Y)
2
= 0 when:
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All the Y-values are positive
All the Y-values lie on the line
All the Y-values lie above the line
None of these
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Question # 12
The additive model of the time series is:
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Y = T + S + C + I
TSCI
Y = a + bX
Y = a + bX + cX
2
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Question # 13
ŷ=a+bx, this line will be called least squares line if it makes=Σ(y-a-bx)2
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maximum
constant
minimum
variable
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Question # 14
In a straight line equation Y = a + bX; a is the:
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X - intercept
Slope
Y- intercept
None of them
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Question # 15
The rise and fall of a time series periods longer than one- year is called.
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Secular trend
Seasonal variation
Cyclical variation
Irregular variation
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Question # 16
The graph of a time series is called
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histogram
polygon
straight line
historigram
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Question # 17
A business cycle has
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one phase
two phases
three phases
four phases
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