Question

Writetheformulaforclassmark​

Answer 1

Step-by-step explanation:

class mark = lower limit + upper limit

Answer 2

Answer:

From equation (1) and equation (4), we have formula for the class mark and class size for a given class interval respectively. Hence, ClassMark=actualupperlimit+actual lowerlimit2 and classsize=actualupperlimit - actuallowerlimit .

Step-by-step explanation:

Example problem: Find the midpoint for class limits of 180 & 199. The average of the class limits is (180 + 199) / 2 = 189.5. This is your midpoint. You might see the class mark defined as the average of the class boundaries as well.