Question

3. Find any class with class size 5 and class mark 53.5. .​

Answer 1

Step-by-step explanation:

Given : If the class mark of a class interval is 8.5. The class size is 5.

To find : The class limit of the corresponding class interval?

Solution :

Let the class mark, x=8.5

Class size, h=5

Lower limit is

L=x -\frac{h}{2}L=x−

2

h

L=8.5-\frac{5}{2}L=8.5−

2

5

L=8.5-2.5L=8.5−2.5

L=6L=6

Upper limit is

U=x+\frac{h}{2}U=x+

2

h

U=8.5+\frac{5}{2}U=8.5+

2

5

U=8.5+2.5U=8.5+2.5

U=11U=11

Therefore, Class interval : 6 - 11