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: 207, 166, 142, 122, 173, 144, 142, 129, 193, 149, 206, 164, 215, 115, 153, 117, 194, 160, 199, 166, 183, 214

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