## 10

## Curve Fitting

**Prerequisites**

*Before you start reading this unit, you should:*

- Have some knowledge in partial differentiation
- Be able to do some calculations like summations, logarithms of some numbers and their anti logarithms.
- Have little knowledge in plotting of points

**Learning Objectives**

*After going through this unit, you would be able to:*

- Know fitting a curve to a data
- Obtain normal equations for any curve
- Understanding the method of least squares in fitting any curve

##### INTRODUCTION

The general problem in curve fitting is to find an analytical expression to a given set of data points (*x*_{i}, *y*_{i}), where *x* is the independent variable and* y* is the dependent variable.

In practical statistics, the curve fitting enables us to represent the relationship ...