f Now we fill in the "rf" column. Remember that "rf' stands for relative frequency: rf = . To find 11, n remember that the cf value for Class 5 is the same as n, since n = 2 f. In the table, rf is expressed as a decimal. f 8 To find the rf value for Class 1, you take = . n 50 f 8 To find the rf value for Class 2, you take = : n 50 f 10 To find the rf value for Class 3, you take = : n, 50 f 6 To find the rf value for Class 4, you take = : n 50 f 18 To find the rf value for Class 5, you take = E: n