Question

Following are the marks (out of 100) obtained by 50 students in statistics:

70	55	51	42	57	45	60	47	63	53
33	65	39	82	55	64	58	61	65	42
50	52	53	45	45	25	36	59	63	39
65	54	49	54	64	75	42	41	52	35
30	35	15	48	26	20	40	55	46	18

make a frequency distribution taking the first class interval as 0-10.

Answer 1

In the form of frequency distribution, the given data can be arranged as follows.

Marks	Tally Marks	Number of students (Frequency)
0 - 10 10 - 20 20 - 30 30 - 40 40 - 50 50 - 60 60 - 70 70 - 80 80 - 90	- $\mathrm{{\rm I}{\rm I}}$ $\mathrm{{\rm I}{\rm I}{\rm I}}$ $\bcancel{\mathrm{{\rm I}{\rm I}{\rm I}{\rm I}}}\mathrm{{\rm I}{\rm I}}$ $\bcancel{\mathrm{{\rm I}{\rm I}{\rm I}{\rm I}}}\bcancel{\mathrm{{\rm I}{\rm I}{\rm I}{\rm I}}}\mathrm{{\rm I}{\rm I}}$ $\bcancel{\mathrm{{\rm I}{\rm I}{\rm I}{\rm I}}}\bcancel{\mathrm{{\rm I}{\rm I}{\rm I}{\rm I}}}\mathrm{{\rm I}{\rm I}{\rm I}{\rm I}}$ $\bcancel{\mathrm{{\rm I}{\rm I}{\rm I}{\rm I}}}\mathrm{{\rm I}{\rm I}{\rm I}{\rm I}}$ $\mathrm{{\rm I}{\rm I}}$ $\mathrm{{\rm I}}$	0 2 3 7 12 14 9 2 1
		$\sum _{}f=50$