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      Experiments and observations: In this method, data is collected by directly observing
                             events or conducting experiments.

                           IoT sensors and smart devices: Smart devices such as wearables, temperature sensors
                             and cameras collect real-time data automatically.
                           Marketing  campaigns  and  feedback forms: Companies  collect  customer  responses

                             through feedback forms or promotional campaigns.
                        Secondary data sources: Secondary data refers to data that has already been collected,
                         processed and stored by someone else. This data is easily available and helps save time and

                         cost. Secondary data is useful when existing information is sufficient for analysis.
                         Common sources of secondary data include:

                           Books, journals  and  research papers: Academic  publications  provide  reliable  and
                             structured information.

                           Websites and  online databases: Many  organisations  provide  open  datasets  online.
                             Some examples include Government websites, Research platforms, Public datasets, etc.
                             These platforms provide data related to population, economy, health and education.

                           Historical records: These include past data stored in files, reports or records.

                      For example:

                      In this stage, data is collected from students:
                         Gadget Type (Mobile/Tablet/Laptop)

                         Daily Screen Time (hours)

                        Sleep Hours
                         Outdoor Activity Time

                        Academic Score

                         Screen Time Level (High/Low)

                         Student        Gadget        Screen          Sleep       Outdoor       Academic        Screen

                                         Type           Time         Hours         Activity       Score       Time Level

                        Student 1       Mobile          5 hrs           6          30 min           65           High

                        Student 2       Laptop          2 hrs           9            1 hr           80           Low

                        Student 3       Tablet          4 hrs           7          45 min           70             H

                        Student 4       Laptop         1.5 hrs          8           1.5 hr          85             L

                        Student 5       Mobile          4 hrs           6            1 hr            -           High

                       16        Artificial Intelligence (CT & AI)-VIII

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