For quantitative data it is observed that there is a tendency of the data to be distributed about a central value which is a typical value and is called a measure of central tendency. It is also called a measure of location because it gives the position of the distribution on the axis of the variable.

There are three commonly used measures of central tendency, *viz. *Mean, Median and Mode. The mean again may be of three types, *viz. *Arithmetic Mean (A.M.), Geometric Mean (G.M.) and Harmonic Mean (H.M.). Below we shall discuss these different measures.** **