Question

The class mark of a distribution are 26, 31, 36, 41, 46,51. What are the class limit of the last class mark?

Answer 1

Answer:

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

Class limit of the last class mark = 48.5−53.5