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Online Tests
ICS Part 2 Statistics Chapter 16 Online Test MCQs With Answers
Question # 1
Methods of semi-averages gives an
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accurate result
objective result
authentic result
none of these
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Question # 2
For a least squares linear trend=ŷ = a + bx, b is the
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variable
intercept
trend
slope
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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
For a least squares linear trend Y = a + bX
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ΣY = ΣY
ΣY = 0
ΣY > ΣY
None of them
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Question # 5
Which one is a rough and crude method for measuring secular trend ?
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free hand curve method
semi average method
moving averages method
least square method
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Question # 6
The least squares estimates are unbiased estimates of the
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statistic
time series
parameters
variance
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Question # 7
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 # 8
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 # 9
Sum of squares of residuals is denoted by
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∑
e
∑
e
2
∑
e
3
∑
e
4
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Question # 10
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 # 11
The method of least square gives too much weight to extremely large deviations from the
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population
parameter
sample
trend
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Question # 12
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 # 13
The systematic components of time series which follow regular pattern of variations are called:
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Noise
Signal
Additive model
Multiplicative model
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Question # 14
The sum of deviations=Σ(y-ŷ) =
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0
1
10
-1
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Question # 15
The graph of a time series is called
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histogram
polygon
straight line
historigram
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Question # 16
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 # 17
The straight line is fitted to a time series when the movements in the time series are
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linear
quadratic
cubic
constant
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Question # 18
The basic components of a time series are:
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2
3
4
5
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