For the class intervals `0-5, 5-10, 10-15,` etc.The length of the class is .....

The following data : 2, 5, 15, 25, 20, 12, 8, 7, 6, 16, 21,17, 30, 32, 23, 40, 51, 15, 2, 9, 57, 19, 25 is grouped in the classes 0 –5, 5 –10, 10 –15 etc. Find the frequency of the class 20 –25.

In a frequency distribution with classes 0-10, 10-20 etc., the size of the class intervals is 10. The lower limit of fourth class is

For overlaping classes 0-10,10-20,20-30, etc.Then the class mark of the class 0-10 is

In a frequency distribution, the mid-value of a class is 15 and the class intervals is 4. The lower limit of the class is 10 (b) 12 (c) 13 (d) 14

In a frequency distribution, the mid-value of a class is 15 and the class intervals is 4. The lower limit of the class is 10 (b) 12 (c) 13 (d) 14

The classes are 5-10,10-15,15-20,…….Find the class width of each class.

Class intervals in a grouped frequency distribution are given as 5 – 12, 13 – 20, 21 – 28, 29 – 36, 37 – 44. Write the next two class intervals. What is the length of each class interval?

In the class intervals 10-20, 20-30, the number 20 is included in.

(i)Find the class mark of the class 90-120. (ii)In a frequency distribution, the mid-value of the class is 10 and width of the class is 6. Find the lowe limit of the class. (iii)The width of each of the five continuous classes in a frequency distribution is 5 and lowe class limit of the lowest class is 10. What is the upper class limit of the highest class? (iv) The class marks of a frequency distribution are 15,20,25...... Find the class corresponding to the class mark 20. (v)In the class intervals 10-20, 20-30, find the class in which 20 is included.

Write the class size of 0-4,5-9, 10-14 Write the class limits in 10.4-11.4, 11.4- 12.4