Question

Marks scored by 50 students are given below:
40
45
38
24
46
45
18
53
64
45
32
42
65
54
52
50
78
52
64
66
43
55
43
48
51
48
20
27
65
37
55
55
66
16
62
54
60
58
46
35
72
62
38
30
58
36
43
82
46
53
(a) Arrange the marks in ascending order.
(b) Represent the marks in the form of discrete frequency distribution.
(c) Construct an inclusive frequency distribution with first class as 10-19. Also construct
class boundaries
(d) Construct a frequency distribution with exclusive class-intervals, taking the lowest class
as 10-20​

Answer 1

Answer: The frequency distribution table for the given marks can be drawn as:

(i) The class interval (40−49) has the highest frequency and the class interval (90−99) has the lowest frequency.

(ii) In the class interval (30−39), the lower limit is 30 − 0.5 = 29.5 and the upper limit is

39 + 0.5 = 39.5.

(iii) The range of the given distribution is 97− 32 = 65.

I hope it's help you.