Q. The marks scored by 40 candidates in an examination (out of 100) is given below:
75,65,57,50,32,54,75,67,75,88,80,42,40,41,34,78,43,61,42,46
68,52,43,49,59,49,67,34,33,87,97,47,46,54,48,45,51,47,41,43.
Prepare a frequency distribution table with the class size 10. Take the class intervals as (30−39),(40−49),... and answer the following questions:
(i) Which class intervals have the highest and lowest frequency?
(ii) Write the upper and lower limits of the class interval 30−39.