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    GOOD DATA

                                      2                                       AND BAD DATA

                     PRIMARY PREVIEW

                        Understanding Data                                Sources of Data
                        Types of Data                                     Data Collection by Machines
                        Understanding Database                            Your Choice - Good Data and Bad Data

                     Think about the last time you searched for a cartoon on YouTube, asked a voice
                     assistant to play your favourite song or checked the score of a cricket match on

                     your phone. In all these examples, data is being collected.

                     UNDERSTANDING DATA

                     Data  is  the  raw collection  of

                     facts,  figures,  symbols  or
                     observations  that  represent
                     details about events or objects.

                     Data can be numbers, words,
                     pictures,  sounds  or even

                     locations  on a  map.  For
                     example,  the temperature  on
                     a thermometer  is  data.  The

                     number  of goals  scored  in a
                     football  match  is also data.
                     Similarly,     the    names        of

                     students in your class register are data.                                        fact bits

                     By  itself, data  may  seem  meaningless,  but  when it  is                 Every day, more than
                     organised, processed and interpreted, it  transforms into                    2.5 quintillion bytes
                     valuable insights that support decision-making, problem-                     of data are created.

                     solving and innovation.

                                                                                          Good Data and Bad Data       21

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