Q. 34.2( 98 Votes )

Class intervals in a grouped frequency distribution are given as 4 – 11, 12 – 19, 20 – 27, 28 – 35, 36 – 43. Write the next two class intervals. (i) What is the length of each class interval? (ii) Write the class boundaries of all classes, (iii) What are the class marks of each class?

Answer :

Next two class intervals 44 - 51 and 52 - 59.

(i) length of class interval = difference b/w upper and lower limit = 7


(ii)



(iii)


We know,


Class-mark



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