What Is the Least Squares Method?
- The least-squares method is a statistical procedure to find the best fit for a set of data points by minimizing the sum of the offsets or residuals of points from the plotted curve.
- Least squares regression is used to predict the behavior of dependent variables.
What is least square method formula?
Least Square Method Formula
- Suppose when we have to determine the equation of line of best fit for the given data, then we first use the following formula.
- The equation of least square line is given by Y = a + bX.
- Normal equation for 'a':
- ∑Y = na + b∑X.
- Normal equation for 'b':
- ∑XY = a∑X + b∑X2
What is least square method example?
Eliminate a from equation (1) and (2), multiply equation (2) by 3 and subtract from equation (2). Thus we get the values of a and b. Here a=1.1 and b=1.3, the equation of least square line becomes Y=1.1+1.3X.
