1 |
The straight line is fitted to a time series when the movements in the time series are |
- A. linear
- B. quadratic
- C. cubic
- D. constant
|
2 |
The graph of a time series is called |
- A. histogram
- B. polygon
- C. straight line
- D. historigram
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3 |
The systematic components of time series which follow regular pattern of variations are called: |
- A. Noise
- B. Signal
- C. Additive model
- D. Multiplicative model
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4 |
For a least squares linear trend ŷ = a + bx, the Σ(y-ŷ)<sup>2</sup> = 0 when |
- A. all the y-values lie on the line
- B. all the y-values are positive
- C. all the y-+values lie above the line
- D. none of these
|
5 |
A business cycle has |
- A. one phase
- B. two phases
- C. three phases
- D. four phases
|
6 |
The secular trend is measured by the method of semi-averages when |
- A. time series contains yearly values
- B. trend is linear
- C. time series contains odd number of values
- D. none of these
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7 |
For a least squares linear trend=ŷ= a + b x, |
- A. Σy <Σŷ
- B. Σŷ = 0
- C. Σy =Σŷ
- D. none of these
|
8 |
In the measurement of secular trend the moving averages: |
- A. Give the trend in a straight line
- B. Measure the seasonal variations
- C. Smooth out a time series
- D. None of these
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9 |
ŷ=a+bx, this line will be called least squares line if it makes=Σ(y-a-bx)2 |
- A. maximum
- B. constant
- C. minimum
- D. variable
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10 |
Methods of semi-averages gives an |
- A. accurate result
- B. objective result
- C. authentic result
- D. none of these
|