Question

Marks obtained by 30 students in English (out of 50), are given below :
32, 38, 10, 14, 15, 25, 26, 39, 45, 48, 39, 40, 45, 46, 42, 48, 32, 10, 16, 15, 45, 48, 38, 40, 46, 45, 47, 48,
32, 10
Prepare a grouped frequency distribution table and answer the following questions :
(a) What is the class size?
(b) Which class has the highest frequency?
(c) Which class has the lowest frequency?
(d) What is the class mark of fourth class interval ?​

Answer 1

Answer:

1. a) 48- 10 =38 38 is the class size.

b) 40 - 50 class has the highest frequency .

c) 20 - 30 class has the lowest frequency.

d) class mark = upper class + lower class ÷ 2

14 +2 ÷2 = 16 ÷2 =8