Question

the class mark of a frequency distribution are 28 34 40 46 52 find the class size and all the class interval​

Answer 1

The class mark of a frequency distribution are:

28 34 40 46 52

We have to find the class size and all the class interval​.

Solution:

The class interval:

28 - 34

34 - 40

40 - 46  

46 - 52

The class interval:

28 - 34

Here, upper limit = 34 and lower limit = 28

We know that:

The class interval = Upper limit - Lower limit

= 34 - 28

= 6

Thus, the class interval are "28 - 34 , 34 - 40, 40 - 46   and 46 - 52"  and the "class size is 6".

Answer 2

Answer:

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Step-by-step explanation:

Here,

Class size = Difference b/w any two consecutive class marks = 31-26 = 5

Therefore,

Lower limit of first class interval = 26−

2

5

=23.5

Upper limit of first class interval = 26+

2

5

=28.5

Therefore, first class interval is 23.5-28.5.

Thus, the class intervals are :

23.5−28.5,28.5−33.5,33.5−38.5,38.5−43.5,43.5−48.5,48.5−53.5

Since, the classes are formed by exclusive method. Therefore, these limits are true class limits.