11-14-2014, 08:43 AM
Least square method of population projection
This method is applicable when time-series data is available. It is a simple method commonly used to make future projections on the basis of the past
trend. It is common to fit a straight line to the past observations.
y= a+bx
a= ƩY / N
b= Ʃxy /x2
y= last five year decades population x= -2,-1,0,1,2
N= 5 (for five year population data)
This method is applicable when time-series data is available. It is a simple method commonly used to make future projections on the basis of the past
trend. It is common to fit a straight line to the past observations.
y= a+bx
a= ƩY / N
b= Ʃxy /x2
y= last five year decades population x= -2,-1,0,1,2
N= 5 (for five year population data)