Page 155 - Data Science class 10
P. 155

The below graph shows there are approximately an equal number of students who voted Classical and Rock as
            their favourite music.
                                                      Favourite Type of Music
                                      60


                                      50


                                     Number of Students  30
                                      40





                                      20

                                      10


                                       0
                                          Classical   Rap     Bollywood    Pop       Rock
                                                             Student Choices

            Students can explore favourite and second favourite music which are answers to questions 2 and 3 on the survey
            through two-way graph as shown in following figure:


                                          Rock

                                           Pop
                                    Second favourite type   of music  Bollywood




                                          Other
                                           Rap

                                         Classical

                                                 Classical  Rap  Other  Bollywood  Pop  Rock
                                                      First  favourite and second favourite
                                                                choice of music
            Here, they can say that all but two students have Pop and Rock as their first and/or second choices for type
            of music preferences. In this graph, each dot represents a student in the class who responded to the survey. This
            two-way graph shows 36 bins (6 possible second favourite music types by 6 possible favourite
            music types). The bin in the top left corner has two dots in it, representing the two students
            in the class who answered that their favourite type of music is Classical, and their second
            favourite type of music is Rock. Analysis of the favourite and second favourite types of music
            shows that nearly all the students (17 students, those shaded lighter in the above figure) in
            the class have voted the Bollywood, Pop and Rock as their first or second choice. Only two
            students (those shaded in a darker colour) did not rank Bollywood, Pop and Rock in top two.
            Students can also look at the choice between live band and DJ and add this to their final
            conclusions about the types of music that students like (as shown in the figure below). The
            difference in the number of students, who prefer a live band versus a DJ, is zero.
                                                                                                       Live     DJ
                                                                                                       Band


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