| 1 |
The rise and fall of a time series periods longer than one- year is called. |
- A. Secular trend
- B. Seasonal variation
- C. Cyclical variation
- D. Irregular variation
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| 2 |
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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| 3 |
The graph of a time series is called |
- A. histogram
- B. polygon
- C. straight line
- D. historigram
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| 4 |
Methods of semi-averages gives an |
- A. accurate result
- B. objective result
- C. authentic result
- D. none of these
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| 5 |
For a least squares linear trend=ŷ = a + bx, b is the |
- A. variable
- B. intercept
- C. trend
- D. slope
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| 6 |
The equation of the quadratic (parabolic) trend is |
- A. ŷ=a+bx
- B. ŷ=a+by
- C. ŷ=a+bΣx+cΣx<sup>2</sup>
- D. ŷ=a+bx+cx<sup>2</sup>
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| 7 |
For a least squares linear trend Y = a + bx, the Σ(Y - Y)<sup>2</sup> = 0 when: |
- A. All the Y-values are positive
- B. All the Y-values lie on the line
- C. All the Y-values lie above the line
- D. None of these
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| 8 |
The unsystematic sequence which follows irregular pattern of variations is called: |
- A. Noise
- B. Signal
- C. Linear
- D. Non-linear
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| 9 |
For a least squares linear trend=ŷ= a + b x, |
- A. Σy <Σŷ
- B. Σŷ = 0
- C. Σy =Σŷ
- D. none of these
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| 10 |
In time series seasonal variations can occur within a period of: |
- A. Nine years
- B. Four Years
- C. Three years
- D. One year
|