The class width is also the difference between the lower limits of two consecutive classes or the upper limits of two consecutive classes. It is not the difference between the upper and lower limits of the same class. The number in the middle of the class.

One may also ask, what class limit is the smallest value? Class limits, class boundaries, class marks. There are two for each class. The lower class limit of a class is the smallest data value that can go into the class. The upper class limit of a class is the largest data value that can go into the class.

Also question is, what is the difference between class limits in class boundaries?

Class limits are values halfway between the upper class boundary of one class and the lower class boundary of the next. Class boundaries are values halfway between the upper class limit of one class and the lower class limit of the next. Class boundaries are not possible data values.

Are the categories by which data are grouped?

When the range of the data is large, the data must be grouped into classes that are more than one unit in width, in what is called a grouped frequency distribution. The lower class limit represents the smallest data value that can be included in the class.