| 1 |
Which one is a rough and crude method for measuring secular trend ? |
- A. free hand curve method
- B. semi average method
- C. moving averages method
- D. least square method
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| 2 |
For a least squares linear trend=ŷ = a + bx, b is the |
- A. variable
- B. intercept
- C. trend
- D. slope
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| 3 |
Sum of squares of residuals is denoted by |
- A. ∑<i>e</i>
- B. ∑<i>e</i><sup>2</sup>
- C. ∑<i>e</i><sup>3</sup>
- D. <span style="font-size: 14.399999618530273px;">∑</span><i style="font-size: 14.399999618530273px;">e</i><sup>4</sup>
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| 4 |
For a least squares line trend Y = a + bx, the b is the: |
- A. Intercept
- B. Slope
- C. Variable
- D. Trend
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| 5 |
The secular trend is measured by the method of semi-averages when: |
- A. Time series contains yearly value
- B. Trend is linear
- C. Time series contains odd number of values
- D. None of them
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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 |
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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| 8 |
The graph of a time series is called |
- A. histogram
- B. polygon
- C. straight line
- D. historigram
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| 9 |
For a least squares linear trend Y = a + bX |
- A. ΣY = ΣY
- B. ΣY = 0
- C. ΣY > ΣY
- D. None of them
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| 10 |
In a straight line equation Y = a + bX; a is the: |
- A. X - intercept
- B. Slope
- C. Y- intercept
- D. None of them
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