# Chapter 5 – Data Handling

The following Topics and Sub-Topics are covered in this chapter and are available on MSVgo:

Introduction

When you think of Mathematics you probably think of it only as a branch of science, It is in fact, also data which is considered as the foundation stone of Science. In fact, the marks you obtained, your weight, the score you get, everything is data. Comprehending the meaning of data, methods, and ways of representing it in the form of graphs is the core component of data handling.

Data Handling implies the way of gathering and presenting information in different structures. It is a strategy to extract information from large amounts of data. It involves organizing data and grouping data into a meaningful form that is useful and presentable. Raw data refers to the data that is collected in the initial stage. The process to organize that data to conduct a mathematical operation is called data handling.

#### Data Handling Examples

Here are a few real-life examples of data handling

• Voter polls
• Marketing survey
• Tally charts of data
• Numbers of pens/pencils you have
• Marks you got in your exams

Organising Data

The data provided is mostly in unorganized or raw form. To arrive at a meaningful conclusion, you need to extract the information efficiently. Let us try to understand with the help of an example –

A group of students was asked for their favorite fruits. The responses were –

Apple, Orange, Mango, Apple, Litchi, Mango, Orange, Litchi, Mango

The process of arranging these data in a meaningful manner to draw proper inferences is called organising data. For example –

FruitsNumber of Students
Apple2
Orange2
Mango3
Litchi2

Grouping Data

Often the data provided is large.  In such circumstances,  data is arranged in a group. For example –  Marks obtained by group are as follows- 21, 10, 30, 22, 30, 5, 30, 12, 25, 15, 26

GroupStudents (Frequency)
0-101
10-203
20-307

Such representation of data is referred to as grouping data and the frequency obtained is called a grouped frequency distribution.

#### Circle Graph or Pie Chart

Pie Chart underscores the relationship between the circle and its parts. The circle is divided  into different chunks. The size of every segment is related to the data it represents. In other words, each sector is proportional to the other. It is referred to as a Circle graph because it represents data as a circle.

#### Chance and Probability

How many times does it happen that when you take your umbrella with you, it doesn’t rain, and on the off chance that you neglect to take it one day, it rains heavily and you get all wet? There are numerous circumstances that we face in life where we need to take decisions depending on the likelihood of an outcome.

Chance means the happening of any event in the absence of any cause. Probability is one of the cardinal branches of mathematics and an important topic in data. In short, probability means possibility. It is the likelihood of the event to occur.

Probability of an event =    Number of outcomes that make an event

Total number of outcomes of the experiment

#### FAQs

1. What is data in data handling in maths?

Data alludes to any snippet of information that gets utilized for performing different numerical tasks. Data is a plural form of the word datum, a solitary type of data. Models – Facts, numbers, words, estimations, and measurements are examples of data.

2. What are the types of data handling?

Data can be handled in various ways. You can use the following data types for data handling-

• Qualitative Data– This data provides descriptive information about something.
• Quantitative Data– This data imparts numerical information about something.

3. How do you introduce data handling?
Follow the steps below to introduce data handling-

• Start with the basics of handling  like meaning and types of data
• Gradually try to learn the concepts with the help of examples.
• Lastly, begin with some interactive exercises or inquisitive questions on data handling.   Understand the meaning in simple words and move steadily towards complex topics related to data handling.

4. What is the purpose of data handling?

• The main purpose of data handling is to present the data that is easily understood and proves to be helpful to others.
• Data handling helps in maintaining the integrity of research data that involves confidentiality, preservation, and retention of data for various mathematical purposes.

5. How is data represented in data handling?

You can represent data in the following ways-

• Bar Graph
• Line Graphs
• Pictographs
• Histograms
• Stem and Leaf Plot
• Dot Plots
• Frequency Distribution
• Cumulative Tables and Graphs

6. What are the two ways of handling data?

The two ways of handling data are as follows-

• Electronic Method- When information is obtained, stored, archived, and disposed using electronic systems like computers, CD and pen drive, etc.
• Non-electronic Method- This method involves using non-electronic means like paper, notebooks, journals, and files for obtaining, storing, and data handling.

For better understanding, you can view videos on the MSVgo app. You can also get to resolve your Data Handling Class 8 questions to enhance your comprehension of the subject matter. MSVgo is an application whose main objective is to help you to understand the principles and concepts with examples using explanatory visuals or animation.

Data handling is a pivotal chapter for exams. Preparing well can assure good marks in exams.  Data handling is helpful in deriving solutions to complex problems, including real-life complexities.

### High School Physics

• Alternating Current
• Atoms
• Communication Systems
• Current Electricity
• Dual nature of Radiation and Matter
• Electric Charges and Fields
• Electricity
• Electromagnetic Induction
• Electromagnetic Waves
• Electrons and Photons
• Electrostatic Potential and Capacitance
• Fluid Pressure
• Force and Acceleration
• Force And Laws Of Motion
• Gravitation
• Internal Energy
• Kinetic Theory
• Law of motion
• Light – Reflection And Refraction
• Magnetic Effects Of Electric Current
• Magnetism and Matter
• Management Of Natural Resources
• Mechanical properties of Fluids
• Mechanical properties of Solids
• Motion
• Motion in a plane
• Motion in a straight line
• Moving Charges and Magnetism
• Nuclear Energy
• Nuclei
• Oscillations
• Our Environment
• Paths of Heat
• Physical world
• Ray optics and optical instruments
• Semiconductor Devices
• Semiconductor Electronics: Materials, Devices and Simple Circuits
• Simple Machines
• Sound
• Sources Of Energy
• Specific and Latent Heats
• Spherical Mirrors
• Static Electricity
• Systems of Particles and Rotational motion
• Thermal properties of matter
• Thermodynamics
• Units and Measurement
• Vectors, Scalar Quantities and Elementary Calculus
• Wave Optics
• Waves
• Work, Power and Energy

### High School Chemistry

• Acids, Bases and Salts
• Alcohols, Phenols and Ethers
• Aldehydes, Ketones and Carboxylic Acids
• Aliphatic and Aromatic Hydrocarbons
• Alkyl and Aryl Halides
• Amines
• Analytical Chemistry
• Atomic Structure
• Atoms And Molecules
• Basic concepts of Chemistry
• Biomolecules
• Carbon And Its Compounds
• Carboxylic acids and Acid Derivatives
• Chemical Bonding and Molecular Structures
• Chemical Energetics
• Chemical Equilibria
• Chemical Kinetics
• Chemical Reactions And Equations
• Chemical Reactions and Their Mechanisms
• Chemistry in Everyday Life
• Chemistry of p-Block elements
• Chemistry of Transition and Inner Transition
• Classification of Elements
• Coordination Compounds
• Cyanide, Isocyanide, Nitro compounds and Amines
• Electrochemistry
• Electrolysis
• Elements, Compounds and Mixtures
• Environmental Chemistry
• Equilibrium
• Ethers and Carbonyl compounds
• Haloalkanes and Haloarenes
• Hydrocarbons
• Hydrogen
• Ideal solutions
• Introduction to Organic Chemistry
• Ionic equilibria
• Matter
• Matter Around Us
• Matter In Our Surroundings
• Metallurgy
• Metals And Non-Metals
• Mole Concept and Stoichiometry
• Natural Resources
• Organic Chemistry – Basic Principles
• Periodic Classification of Elements
• Physical and Chemical Changes
• Physical and Chemical Properties of Water
• Polymers
• Preparation, Properties and Uses of Compounds
• Principles and Processes of Isolation of Elements
• Redox Reactions
• Relative Molecular Mass and Mole
• States of Matter
• Structure Of The Atom
• Study of Compounds
• Study of Gas Laws
• Study of Representative Elements
• Surface Chemistry
• The d-block and f-block elements
• The Gaseous State
• The p-Block Elements
• The Periodic Table
• The s-Block Elements
• The Solid State
• Thermodynamics

### High School Biology

• Absorption and Movement of Water in Plants
• Anatomy of Flowering Plants
• Animal Kingdom
• Bacteria and Fungi-Friends and Foe
• Biodiversity and Conservation
• Biofertilizers
• Biological Classification
• Biomedical Engineering
• Biomolecules
• Biotechnology and its Applications
• Biotic Community
• Body Fluids and Circulation
• Breathing and Exchange of Gases
• Cell – Unit of Life
• Cell Cycle and Cell Division
• Cell Division and Structure of Chromosomes
• Cell Reproduction
• Cellular Respiration
• Chemical Coordination and Integration
• Circulation
• Control And Coordination
• Crop Improvement
• Digestion and Absorption
• Diversity In Living Organisms
• Ecosystem
• Environmental Issues
• Excretory Products and their Elimination
• Flowering Plants
• Genes and Chromosomes
• Health and Diseases
• Health and Its Significance
• Heredity And Evolution
• Heredity and Variation
• How Do Organisms Reproduce?
• Human Diseases
• Human Eye And Colourful World
• Human Health and Disease
• Human Population
• Human Reproduction
• Hygiene
• Improvement In Food Resources
• Integumentary System- Skin
• Kingdom Fungi
• Kingdom Monera
• Kingdom Protista
• Life Processes
• Locomotion and Movement
• Microbes in Human Welfare
• Mineral Nutrition
• Molecular Basis of Inheritance
• Morphology of Flowering Plants
• Neural Control And Coordination
• Nutrition in Human Beings
• Organism and Population
• Photosynthesis
• Photosynthesis in Higher Plants
• Plant Growth and Development
• Plant Kingdom
• Pollination and Fertilization
• Pollution; Sources and its effects
• Principles of Inheritance and Variation
• Reproduction and Development in Angiosperms
• Reproduction in Organisms
• Reproductive Health
• Respiration in Human Beings
• Respiration in Plants
• Respiratory System
• Sexual Reproduction in Flowering Plants
• Strategies for Enhancement in Food Production
• Structural Organisation in Animals
• Structural Organisation of the Cell
• The Endocrine System
• The Fundamental Unit Of Life
• The Living World
• The Nervous System and Sense Organs
• Tissues
• Transpiration
• Transport in Plants

### High School Math

• Algebra – Arithmatic Progressions
• Algebra – Complex Numbers and Quadratic Equations
• Algebra – Linear Inequalities
• Algebra – Pair of Linear Equations in Two Variables
• Algebra – Polynomials
• Algebra – Principle of Mathematical Induction
• Binomial Theorem
• Calculus – Applications of Derivatives
• Calculus – Applications of the Integrals
• Calculus – Continuity and Differentiability
• Calculus – Differential Equations
• Calculus – Integrals
• Geometry – Area
• Geometry – Circles
• Geometry – Conic Sections
• Geometry – Constructions
• Geometry – Introduction to Euclid’s Geometry
• Geometry – Three-dimensional Geometry
• Geometry – Lines and Angles
• Geometry – Straight Lines
• Geometry – Triangles
• Linear Programming
• Matrices and Determinants
• Mensuration – Areas
• Mensuration – Surface Areas and Volumes
• Number Systems
• Number Systems – Real Numbers
• Permutations and Combinations
• Probability
• Sequence and Series
• Sets and Functions
• Statistics
• Trignometry – Height and Distance
• Trignometry – Identities
• Trignometry – Introduction

### Middle School Science

• Acids, Bases And Salts
• Air and Its Constituents
• Basic Biology
• Body Movements
• Carbon and Its Compounds
• Cell – Structure And Functions
• Changes Around Us
• Chemical Effects Of Electric Current
• Coal And Petroleum
• Combustion And Flame
• Components Of Food
• Conservation Of Plants And Animals
• Crop Production And Management
• Electric Current And Its Effects
• Electricity And Circuits
• Elements and Compounds
• Fibre To Fabric
• Food production and management
• Force And Pressure
• Forests: Our Lifeline
• Friction
• Fun With Magnets
• Garbage In, Garbage Out
• Getting To Know Plants
• Health and Hygiene
• Heat
• Hydrogen
• Life Processes: Nutrition in Animals and Plants
• Materials: Metals And Non-Metals
• Matter and Its States
• Metals and Non-metals
• Micro Organisms: Friend And Foe
• Motion And Measurement Of Distances
• Motion And Time
• Nutrition In Animals
• Nutrition In Plants
• Organization in Living Things
• Our Environment
• Physical And Chemical Changes
• Pollution and conservation
• Pollution Of Air And Water
• Reaching The Age Of Adolescence
• Reproduction In Animals
• Reproduction In Plants
• Respiration In Organisms
• Rocks and Minerals
• Separation Of Substances
• Simple Machines
• Soil
• Some Natural Phenomena
• Sorting Materials Into Groups
• Sound
• Stars And The Solar System
• Structure of Atom
• Synthetic Fibers And Plastics
• The Living Organisms And Their Surroundings
• Transfer of Heat
• Transformation of Substances
• Transportation In Animals And Plants
• Universe
• Waste-water Story
• Water: A Precious Resource
• Weather, Climate And Adaptations Of Animals To Climate
• Winds, Storms And Cyclones

### Middle School Math

• Area and Its Boundary
• Boxes and Sketches
• Data Handling
• Fun With Numbers
• Heavy and Light
• How Many
• Long And Short
• Mapping
• Measurement
• Money
• Multiplication and Factors
• Multiply and Divide
• Numbers
• Parts and Wholes
• Pattern Recognition
• Patterns
• Play With Patterns
• Rupees And Paise
• Shapes And Angles
• Shapes And Designs
• Shapes and Space
• Similarity
• Smart Charts
• Squares
• Subtraction
• Tables And Shares
• Tenths and Hundredths
• Time