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प्रश्न
Choose the correct alternative:
The value of ‘b’ in the trend line y = a + bx is
पर्याय
Always positive
Always negative
Either positive or negative
Zero
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उत्तर
Either positive or negative
APPEARS IN
संबंधित प्रश्न
State the uses of time series
Explain the method of fitting a straight line
State the different methods of measuring trend
The following table gives the number of small-scale units registered with the Directorate of Industries between 1985 and 1991. Show the growth on a trend line by the free hand method.
| Year | No. of units (in '000) |
| 195 | 10 |
| 986 | 22 |
| 1987 | 36 |
| 198 | 62 |
| 1989 | 55 |
| 1990 | 0 |
| 1991 | 34 |
| 1992 | 50 |
Calculate the seasonal indices from the following data using the average method:
| Year | I Quarter | II Quarter | III Quarter | IV Quarter |
| 2008 | 72 | 68 | 62 | 76 |
| 2009 | 78 | 74 | 78 | 72 |
| 2010 | 74 | 70 | 72 | 76 |
| 2011 | 76 | 74 | 74 | 72 |
| 2012 | 72 | 72 | 76 | 68 |
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
Choose the correct alternative:
The components of a time series which is attached to short term fluctuation 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 series `log_4 2 - log_8 2 + log_16 2 + ...............` to `oo` is
The sum of the series 3.6 + 4.7 + 5.8 + ....... upto (n – 2) terms
