The description for statistic diagram. (2) This bar chart presents the gender difference in terms the selection of four sports. We can see large gender gap in football and netball. Football, the most popular event among boys, is chosen by 20 boys, about four times more than the number of girls choosing it (below 5). The favorite sport of girl is netball, chosen by 18 female students, while only 4 boys enjoy this sport. The gender difference is comparatively narrow in swimming and basketball. But swimming attracts more students than basketball. The number of girls choosing swimming is above 15, slightly higher than the figure for boys (below 15). Differently, there are more boys joining the basketball. The number of girls is 7 in basketball group, lower than the 8 of boys. Besides, there are a small part of students who do not participate in any sports. In this group, the number of girls is 5, modestly higher than the figure for boys (4). In summary, the majority of boys prefer football, in contrast to the netball of girls. Swimming and basketball have nearly 50% ratio between boys and girls.