Question

The class interval of a given observation is 10 to 15, then find the class mark for this
Interval.​

Answer 1

Given :-

• Class interval = 10 - 15

To find :-

• Class mark = ?

Solution :-

Class Interval = 10 - 15

$\sf{Class~mark~=~\dfrac{10 + 15}{2}}$

$\sf{=~12.5}$

• Class mark = 12.5

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Know more :-

Class mark :-

• The class mark of the class interval is the value of the midway between its lower limit and the upper limit.

• It is calculated by adding the lower limit limit and upper limit and then dividing it by 2.

Class size :-

• The difference between the upper limit and the lower limit is known as class size.

• Eg - class Interval = 10 - 15

• Its Class size = 15 - 10 = 5