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Question
Choose the correct alternative:
The components of a time series which is attached to short term fluctuation is
Options
Secular trend
Seasonal variations
Cyclic variation
Irregular variation
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Solution
Irregular variation
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RELATED QUESTIONS
Discuss about irregular variation
Explain the method of fitting a straight line
State the different methods of measuring trend
The sales of a commodity in tones varied from January 2010 to December 2010 as follows:
| In Year 2010 | Sales (in tones) |
| Jan | 280 |
| Feb | 240 |
| Mar | 270 |
| Apr | 300 |
| May | 280 |
| Jun | 290 |
| Jul | 210 |
| Aug | 200 |
| Sep | 230 |
| Oct | 200 |
| Nov | 230 |
| Dec | 210 |
Fit a trend line by the method of semi-average
The following table shows the number of salesmen working for a certain concern:
| Year | 1992 | 1993 | 1994 | 1995 | 1996 |
| No. of salesman |
46 | 48 | 42 | 56 | 52 |
Use the method of least squares to fit a straight line and estimate the number of salesmen in 1997
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A time series is a set of data recorded
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The additive model of the time series with the components T, S, C and I is
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The value of ‘b’ in the trend line y = a + bx is
A bullet of mass m and velocity a is fired into a large block of wood of mass M The final velocity of the system is
The sum of the infinite series `x + (1 + 2)/(2!) x^2 + (1 + 2 + 3)/(3!) x^3 +` .... equals
