Example Calculate the arithmetic mean from the following data :

Age (years) below : 25 30 35 40 45 50 55 60

No. of employees : 8 23 51 81 103 113 117 120

Solution :

Index

4.1 Introduction
4.2 Arithmetic Mean
4.3 Properties of Arithmetic Mean
4.4 Median
4.5 Mode
4.6 Empirical relation between mean, median & mode

Chapter 5