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    21 st
                     think & apply                                                                  Century   #Critical Thinking
                                                                                                     Skills
                     1.  Sarah wears a smartwatch that tracks the number of steps she takes every day as part of her fitness
                        routine. What type of data collection method is being used?

                     2.  Rahul takes a photo of the sunset with his phone. When he zooms in on the picture, he notices tiny dots
                        that make up the image. What are these tiny pieces that form the image?

                     3.  You are designing a photo gallery app for a photography business. You want users to upload and view
                        high-quality images easily. What file format would you use to store the images?
                     4.  You are analysing sales data for a clothing store that has been struggling with sales in recent months.
                        To understand the trends and make better decisions, what process would you use to interpret
                        the data?

                     5.  You are using an AI model to predict the prices of items in an online store. The model consistently
                        predicts `15.50, but the actual price is `18.00. How would you describe the model’s predictions?

                                                                                                        21 st
                                                                                                       Century   #Creativity
                                                                                                        Skills
                            1.   Using Microsoft Excel, enter a set of data presenting students marks in different subject such as

                   LAB       English, Hindi, Mathematics, SST. Then, create a bar chart to represent the data visually.
                          2.   Download two photos from Google or any image website of your choice. Save them to your
                             computer or device. Next, open Microsoft Excel  and create a table that includes the following
                             information about each photo: File Name, File Size (in KB or MB), Resolution (Width x Height),
                             Date Taken.

                      cbse handbook questions
                      A.  Multiple Choice Questions.
                          1.  Which of the following is an example of structured data?

                                    a)  Social media posts                    b)  Audio recordings

                                    c)  Student marks in a table              d)  Videos

                          2.  Which method of data collection involves carefully watching and recording information?

                                    a)  Survey                                b)  Measurement

                                    c)  Observation                           d)  Digital collection

                          3.  Which type of graph is best used to show changes over time?

                                    a)  Pie chart                             b)  Line graph

                                    c)  Bar chart                             d)  Table

                                                                                     Data Visualisation and Analysis  65

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