Group numerical data into class intervals

Here are the values of the number of pages in novels borrowed from a library, for a sample of 22: 213, 122, 250, 101, 176, 228, 218, 138, 192, 127, 237, 104, 222, 179, 246, 149, 163, 116, 259, 159, 164, 137

All listed values are whole numbers. Each interval includes both written endpoints; the next whole number starts the next interval

Use class intervals of width 25, starting at 100: 100–124, 125–149, 150–174, 175–199, 200–224, 225–249, 250–274