Question

prepare a comulative frequency of the following.

Marks No. of students

0-20 5

20-40 11

40-60 19

60-80 11

80-100 4​

Answer 1

The cumulative frequency of a value of a variable is the number of values in the collection of data less than or equal to the value of the variable. For example: Let the raw data be 2, 10, 18, 25, 15, 16, 15, 3, 27, 17, 15, 16. The cumulative frequency of 15 = 6 (Since, values ≤ 15 are 2, 10, 15, 15, 3, 15).

Answer 2

see the attachment....