Question

Write the class size and class mark of class 15-20

Answer 1

Answer:

class size= 5

Step-by-step explanation:

class size= upper limit - lower limit

20-15=5

Answer 2

The class size and class mark of class 15-20 is 5 and 17.5.

Explanation:

The class size is the difference between the upper limit and the lower limit of the class interval.

it is given by b-a  , where a= lower limit and b=  upper  limit

The class mark is also known as the class midpoint is the particular point in the middle of the class interval.

it is given by $\dfrac{a+b}{2}$  , where a= lower limit and b=  upper limit.

The given class interval :  15-20

Here, Upper limit = 20  and Lower limit = 15

Then ,  Class size = 20-15=5

Class mark =$\dfrac{20+15}{2}=\dfrac{35}{2} =17.5$

Therefore , the class size and class mark of class 15-20 is 5 and 17.5.

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