CBSE Class 9 Maths Chapter 14 Statistics Revision Notes

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CBSE Class 9 Maths Chapter 14 Revision Notes: Statistics

 

Revision is very important for better conceptual understanding and securing good marks, and for Revision, Revision Notes are always considered the best. Revision Notes can be very beneficial for students to revise all their previously prepared chapters and concepts, especially during the examination times when they have to revise the whole syllabus in a limited time period.

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CBSE Class 9 Maths Revision Notes are designed keeping in mind the exam pattern and syllabus of NCERT 2020-21. Students can download the PDF for free and practice the questions to score well in the coming exams.

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CBSE Class 9 Maths Chapter 14 Revision Notes: Statistics

Statistics:-

A study dealing with the collection, presentation, interpretation and analysis of data is called as statistics.

Data:-

  • Facts or figures that are numerical or otherwise, collected with a definite purpose and provide valuable information for interpretation and analysis are called data.
  • Most of the available data is raw data.
  • Raw data can be arranged systematically in order to draw meaningful inferences.
  • Data collected directly from the source through observation or conversation, or participation is called primary data.
  • The data gathered from a source where it already exists is called secondary data.
  • The difference between the highest and lowest values in the given data is called the range of the given data.

 

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