Elementary Statstics

5.2.1 Graphs

A large variety of graphs are used in practice. However, here we shall discuss only some important types of graphs which are more popular. Broadly  various graphs can be divided under the following two heads :

1. Graphs of time series.
2. Graphs of frequency distributions.

Constructing charts and graphs is an art which can be acquired through practice. There are a number of simple rules, adoption of which leads to the effectiveness of the graphs. However, before discussing  these rules, the elementary procedure of constructing a graph is considered.