Chapter 15

Statistics

Statistics

Statistics is the science which studies the methods and techniques used in the collection, presentation and analysis of data and draws. conclusion on the basis of the same. The statistics is thus, used in two senses:

1. In the sense of data and
2. In the sence of science.

In this portion we shall learn the pictorial representation of data such as Pie charts, the mean of grouped data and primary idea of probability.

Pictorial Representation of data:

Some times different. Charts are drawn to interprete any data. They are:

(i) Histogram
(ii) Frequency polygon
(iii) Frequency curve
(iv) Bar diagram
(v) Line graph
(vi) Pictograph and
(vii) Pie charts..............