Class 10 Chapter 14 Statistics Application of mean,median and mode

Statistics is the science of average & estimates. It is the study of collection, analysis, interpretation & Organization of data for specific purpose. We take decision with that data.

Data : Everyday, we come across a wide variety of information in the form of facts, numerical figure, table groups etc. Eg: Information related to profit/ loss of a company, average cricket score for a country, Government expenditure in various sector in a given year, election results, Disease vitality information, Movie collection etc. This information is generally provided by TV, magazine, radio, internet etc. These facts or figure which is numerical or otherwise, collected with a definite purpose is called data. This word is derived by Latin word Datum

Usage of statistics:

Demography data
Sales trends
Un-employement ratio
Data for business decision
Experimental data

Application of Mean, Median & Mode

Mean, median & mode shows different perspective of same data.
Mean gives average of the data. All data is given equal importance. It is used in case where all data is important. E.g. Average salary of employees in an organization
Median is used to find middle most data. It is used to determine a point from where 50% of data is more & 50% data is less. It is used where extreme cases can be ignored. E.g. To find the performance of a cricketer where his worst & best extreme performance can be ignored to give his consistent performance.

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