# Revision Notes For CBSE Class 9 Math Chapter -14 Statistics

Statistics is a branch of mathematics which deals with the collection of data, analysis, organization, interpretation and presentation. Apart from the math subject, Statistics play an important role in different fields of human activity. It is used to analyze about the happening around us, existing position of per capita income, population growth rates, unemployment, schooling, medical, housing, facilities, for forecasting the weather, to predict the age, marks of a student and lot more.

Data is a collection of facts, such as numbers, measurements, observations, etc. The different types of data used are Qualitative and Quantitative. The collected set of data can be represented by bar graph, pie chart,Pictograph, Line graph, Histogram and also in Frequency Distribution.

## Frequently asked Questions on CBSE Class 9 Maths Notes Chapter 14: Statistics

### What is the use of Statistics?

1. Data interpretation 2. Collection of quantitative data 3. Accurate description

### What is a â€˜Meanâ€™?

The mean is the average of the numbers.

### What is data handling?

Data handling is the process of ensuring that research data is stored, archived or disposed off in a safe and secure manner during and after the conclusion of a research project.