Question

The marks scored in a test by 40 students of a class are recorded below:

46	51	36	46	65	73	28	45	38	58	63	62	52	69
42	68	54	54	55	39	48	71	68	32	53	50	34	72
41	61	41	53	46	66	35	43	59	41	26	45

Prepare a grouped frequency distribution table taking classes 21- 30, 31 - 40, ...

Answer 1

Marks	Tally Marks	Frequency
21 - 30	`bb|bb|`	2
31 - 40	`cancel(bb|bb|bb|bb|) bb|`	6
41 - 50	`cancel(bb|bb|bb|bb|) cancel(bb|bb|bb|bb|) bb|bb|`	12
51 - 60	`cancel(bb|bb|bb|bb|) bb|bb|bb|bb|`	9
61 - 70	`cancel(bb|bb|bb|bb|) bb|bb|bb|`	8
71 - 80	`bb|bb|bb|`	3
Total		40