Advertisements
Advertisements
प्रश्न
State the two normal equations used in fitting a straight line
Advertisements
उत्तर
The constants ‘a’ and ‘b’ are estimated by solving the following two normal Equations
`sum"Y"` = na + `"b"sum"X"` .........(2)
`sum"XY" = "a"sum"X" + "b"sum"X"^2` .........(3)
Where ‘n’ = Number of years given in the data.
APPEARS IN
संबंधित प्रश्न
Mention the components of the time series
Write a brief note on seasonal variations
State the different methods of measuring trend
Determine the equation of a straight line which best fits the following data
| Year | 2000 | 2001 | 2002 | 2003 | 2004 |
| Sales (₹ '000) | 35 | 36 | 79 | 80 | 40 |
Compute the trend values for all years from 2000 to 2004
Choose the correct alternative:
The additive model of the time series with the components T, S, C and I is
Choose the correct alternative:
Least square method of fitting a trend is
Choose the correct alternative:
The seasonal variation means the variations occurring with in
The sum of the series `log_4 2 - log_8 2 + log_16 2 + ...............` to `oo` is
Sum of n terms of series 1.3 + 3.5 + 5.7 + ______ is
Let An be the sum of the first n terms of the geometric series `704 + 704/2 + 704/4 + 704/8 + ...` and Bn be the sum of the first n terms of the geometric series `1984 - 1984/2 + 1984/4 + 1984/8 + ...` If An = Bn, then the value ofn is (where n ∈ N).
