The bar chart above provides information on the number of children in an average class at ages 9 and 13 across different countries. The countries observed include Japan, Hong Kong, Russia, the United States, and a global average.
Hong Kong and Japan have similar trends, both having the highest number of students per class compared to other countries. In Japan, the number of students aged 13 is slightly higher than those aged 9, with a difference of approximately three students per class. Similarly, Hong Kong shows a comparable difference between the two ages, but with more students in the 9-year-old classes.
Russia has the smallest class sizes, with around 11 students per class for both age groups. The United States and the global average both have 23 students per class at age 9, which drops slightly to 19 students per class at age 13.
Overall, Japan and Hong Kong have higher numbers of students per class compared to the other countries, indicating a higher population density in these regions.