The frequency distribution table of the fourth question in the second volume of the seventh grade mathematics people's education edition exercise 10.2.
The maximum value of this set of data is 24.4 and the minimum value is 18.5. Their difference is 5.9, and the interval between groups is 1, and they are divided into 6 groups.
18.5≤x< 19.5 6
19.5≤x