Question

uestion - 4
a. The class marks of a distribution are 11,15,19,23,27,31,35 determine the class
size and class boundaries.
(3)​

Answer 1

Answer:

first make a table than two box one for class size and other for class boundary

Answer 2

Step-by-step explanation:

Class size: Difference between the true upper limit and true lower limit of a class interval is called the class size.

Class size remains the same for all class intervals.

For the class interval 10 - 20

Class size is 10, i.e., (20 - 10 = 10)

Class mark: Mid-value of each class interval is called its class mark.

Class mark = ½ (Upper limit + Lower limit)

For the class interval 10 - 20

Class mark = (10 + 20)/2

= 30/2 = 15

Range: The difference between the maximum value and the minimum value of the observation is called the range.

In the above data, the maximum value is 24 and the minimum value is 0.

Therefore, range = 24 - 0 = 24