weh? di nga? xD
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In statistics the class boundaries are numbers that separate classes without forming gaps. To find the lower, you subtract 0.5 and to find the upper, you add 0.5. If the class is 3-7 the lower class boundary would be 2.5 and the upper 7.5. The upper boundary of one class will equal the lower boundary of the next class.
class boundary is the midpoint between the upper class limit of a class and the lower limit class of the next class sequence when making a class interval starting at the lowest lower limit in the bottom of a table.
The lower and upper limits of a class interval are known as Class Limits.
same as grouped data i.e. (upper limit+lower limit)/2
The difference between the upper and the lower limit and we must add + 01 for that difference ..that is called a class size or widthex:-lower class limit = 10upper class limit = 20(20-10) + 1 = 11the answer is = 11