Concise Selina Solutions for Class 9 maths Chapter 18 Statistics


Statistics is the discipline that concerns the collection, organization, analysis, interpretation and presentation of data. In applying statistics to a scientific, industrial, or social problem, it is conventional, to begin with, a statistical population or a statistical model to be studied. Statistics is a branch of mathematics that is concerned with how information is collected, organized, presented, summarised and then analyzed so the conclusion may be drawn from the information.

In today's technologically advanced world, we have access to large volumes of data. The first step of data analysis is to accurately summarize all of this data, both graphically and numerically, so that we can understand what the data reveals. To be able to use and interpret the data correctly is essential to making informed decisions. For instance, when you see a survey of opinion about a certain TV program, you may be interested in the proportion of those people who indeed like the program. When used correctly, statistics tell us any trends in what happened in the past and can be useful in predicting what may happen in the future. We shall learn some of the basics of Statistics here. Statistical knowledge helps you use the proper methods to collect the data, employ the correct analyses, and effectively present the results. Statistics is a crucial process behind how we make discoveries in science, make decisions based on data, and make predictions.