Data Handling | NMMS Revision Notes | Class 8 Maths

 

• Data Handling: Deals with the process of collecting data, presenting it and getting result.
• Data mostly available to us in an unorganised form is called raw data.
• Grouped data can be presented using histogram. Histogram is a type of bar diagram, where the class intervals are shown on the horizontal axis and the heights of the bars show the frequency of the class interval. Also, there is no gap between the bars as there is no gap between the class intervals.
• In order to draw meaningful inferences from any data, we need to organise the data systematically.
• Frequency gives the number of times that a particular entry occurs.
• Raw data can be ‘grouped’ and presented systematically through ‘grouped frequency distribution’.
• 
  
• Statistics: The science which deals with the collection, presentation, analysis and interpretation of numerical data.
• Observation: Each entry (number) in raw data.
• Range: The difference between the lowest and the highest observation in a given data.
• Array: Arranging raw data in ascending or descending order of magnitude.
• Data can also presented using circle graph or pie chart. A circle graph shows the relationship between a whole and its part.
• There are certain experiments whose outcomes have an equal chance of occurring.
• A random experiment is one whose outcome cannot be predicted exactly in advance.
• Outcomes of an experiment are equally likely if each has the same chance of occurring.
• Frequency: The number of times a particular observation occurs in the given data.
• Class Interval: A group in which the raw data is condensed.
  (i) Continuous: The upper limit of a class interval coincides with the lower limit of the next class.
  (ii) Discontinuous: The upper limit of a class interval does not coincide with the lower limit of the next class.
• Class Limits: Each class in a bounded by two figures which are called class limits.
  (i)  Upper Class Limit: The upper value of a class interval.
  (ii)  Lower Class Limit: The lower value of a class interval.
• Class Size or width: The differencebetwen the upper class limit and lower class limit of a class.

For More:-

CBSE Class–VII  | CHAPTER – 1 Integers |  NMMS  Revision Notes  à Click Here

Tracing Changes Through a Thousand Years | NMMS Revision Notes | Class 7 | Social  à Click Here

New Kings and Kingdoms | NMMS Revision Notes | Class 7 | Social  à Click Here

The Delhi Sultanate | NMMS Revision Notes | Class 7 Social à Click Here

The Mughal Empire | NMMS Revision Notes | Class 7 Social à Click Here

Tribes Nomads and Settled Communities | NMMS Revision Notes | Class 7 Social à Click Here

Devotional Paths to the Divine | NMMS Revision Notes | Class 7 Social à Click Here

The Making of Regional Cultures | NMMS Revision Notes | Class 7 Social à Click Here

Eighteenth Century Political Formations | NMMS Revision Notes | Class 7 Social à Click Here

Environment | NMMS Revision Notes | Class 7 Social à Click Here

Inside Our Earth | NMMS Revision Notes | Class 7 Social à Click Here

Our Changing Earth | NMMS Revision Notes | Class 7 Social à Click Here

Air | NMMS Revision Notes | Class 7 Social  à Click Here

Water | NMMS Revision Notes | Class 7 Social à Click Here

Human Environment Interactions the Tropical | NMMS Revison Notes | Class 7 Social à Click Here

Life in the Deserts | NMMS Revision Notes | Class 7 Social à Click Here

On Equality | NMMS Revision Notes | Class 7 Social à Click Here

How the State Government Works | NMMS Revision Notes | Class 7 Social à Click Here

Role of the Government in Health | NMMS Revision Notes | Class 7 Social à Click Here

Growing up as Boys and Girls | NMMS Revision Notes | Class 7 Social à Click Here

Women Change the World | NMMS Revision Notes | Class 7 Social à Click Here

Understanding Media | NMMS Revision Notes | Class 7 Social à Click Here

Markets Around Us | NMMS Revision Notes | Class 7 Social à Click Here

A Shirt in the Market | NMMS Revision Notes | Class 7 Social à Click Here

Nutrition in Plants | NMMS Revision Notes | Class 7 Science à Click Here

Nutrition in Animals | NMMS Revision Notes | Class 7 Science à Click Here

Heat | NMMS Revision Notes | Class 7 Science à Click Here

Acids Bases And Salts | NMMS Revision Notes | Class 7 Science à Click Here

Physical And Chemical Changes | NMMS Revision Notes | Class 7 Science  à Click Here

Respiration In Organisms | NMMS Revision Notes | Class 7 Science à Click Here           

Transportation in Animals and Plants | NMMS Revision Notes | Class 7 Science à Click Here

Force and Pressure | NMMS Quick  Revision Notes | Class: 8 Physics à Click Here

Reproduction In Plants | NMMS Revision Notes | Class 7 Science à Click Here

Motion And Time | NMMS Revision Notes | Class 7 Science à Click Here

Electric Current and its Effects | NMMS Revision Notes | Class 7 Science à Click Here

Light | NMMS Revision Notes | Class 7 Science à Click Here

Waste Water Story | NMMS Revision Notes | Class 7 Science à Click Here

How When and Where | NMMS Revision Notes | Class 8 Social à Click Here

From Trade to Territory | NMMS Revision Notes | Class 8 Social à Click Here

Ruling the Countryside | NMMS Revision Notes | Class 8 Social à Click Here

Tribals Dikus and Vision of Golden Age | NMMS Revision Notes | Class 8 Social à Click Here

When People Rebel | NMMS Revision Notes | Class 8 Social à Click Here

Weavers Iron Smelters and Factory Owners | NMMS Revision Notes | Class 8 Social à Click Here

Civilising the Native Educating the Nation | NMMS Revision Notes | Class 8 Social à Click Here

Women Caste and Reform | NMMS Revision Notes | Class 8 Social à Click Here