Question

The Following is the result of the examination of 55 students in statistics

Classes                        FREQUENCY

33-40                                       4

41-48                                       8

49-56                                       10

57-64                                       11

65-72                                       9

73-80                                       6

81-88                                       2

89-96                                       5

Compute the Following:

1. Mean
2. Median

Answer 1

Solution:

Class (1)	Frequency (f) (2)	Mid value (x) (3)	f⋅x (4)=(2)×(3)	cf (6)
33 - 40	4	36.5	146	4
41 - 48	8	44.5	356	12
49 - 56	10	52.5	525	22
57 - 64	11	60.5	665.5	33
65 - 72	9	68.5	616.5	42
73 - 80	6	76.5	459	48
81 - 88	2	84.5	169	50
89 - 96	5	92.5	462.5	55
---	---	---	---	---
	n=55	-----	∑f⋅x=3399.5	-----

Mean = 61.8091

Median = 60.5