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Examples:
                     • Voice commands (e.g., “Hey Google”)

                     • Music and soundtracks
                     • Phone conversations
                     • Audiobooks and podcasts


                  Characteristics of Good Data
                  To ensure effective use in AI modelling, data must be:

                     • Relevant: Closely related to the problem being solved.
                     • Accurate: Free from errors and inconsistencies.

                     • Complete: All necessary fields are filled.
                     • Timely: Up-to-date and reflects current conditions.
                     • Balanced: No over-representation or under-representation of any group (to avoid bias).

                     • Formatted: Structured correctly for easy analysis (e.g., tabular, JSON, XML, etc.)


                  Sources of Data
                  Data for any project, including AI projects, can be collected from two main sources: Primary and
                  Secondary sources. Understanding these sources helps ensure the data is reliable and suitable

                  for analysis.


                  Primary source of data
                  Primary data is original data collected directly from the source for the first time. This data is
                  specifically gathered to address the research problem or project requirements and has not been
                  previously published or used by others.



                                                       Primary source of data








                        Surveys                     Interviews           Observations                 Experiments
                      Questionnaires                One-on-one         Systematic recording           Controlled tests
                      distributed to a                or group           of behaviours or             where variables
                     selected group of              conversations         events as they             are manipulated to
                    people to gather their          conducted to          naturally occur,           observe effects and
                    opinions, behaviours,          obtain in-depth     without interference.            outcomes.
                      or preferences.               information.


                  Some advantages of Primary data are as follows:
                     • Highly relevant and specific to the problem.
                     • Control over the data collection process, ensuring accuracy and reliability.



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