Mathematics
If 10, 15, 20, … are respectively the mid-value of the classes of a grouped frequency distribution, then the class whole mid-value is 25 is :
20 - 27
22.5 - 27.5
21.5 - 28.5
21 - 28
Statistics
1 Like
Answer
Difference between the mid values = 15-10 = 5
So, the class width = 5
For the class whose mid-value 25 is
Lower limit = 25 - = 22.5
Upper limit = 25 + = 27.5
So the Class is 22.5 - 27.5.
Hence, option 2 is the correct option.
Answered By
1 Like
Related Questions
In a grouped frequency distribution, the class interval are 40 - 49, 50 - 59, …, 80 - 89. The upper boundary of the class (50 - 59) is :
59
59.5
49.5
60
If 0 - 9, 10 - 19, 20 - 29, …., are the classes of a grouped frequency distribution, then the width of each class is :
9
9.5
10
9 or 10
The width of each class interval of a grouped frequency distribution is 8. The lower boundary of the class whose mid-value is 10 is :
2
4.5
5.5
6
The width of each class of a frequency distribution is 5. The upper boundary of the class whose class mark is 25 is :
22
22.5
27
27.5