Question

Prepare a frequency table taking class intervals 20−24, 25−29, 30−34 and so on, from the following data:

21	20	55	39	48	46	36	54	42	30
29	42	32	40	34	31	35	37	52	44
39	45	37	33	51	53	52	46	43	47
41	26	52	48	25	34	37	33	36	27
54	36	41	33	23	39	28	44	45	38

Answer 1

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

Class Intervals	Tally Marks	Frequency
20 - 24 25 - 29 30 - 34 35 - 39 40 - 44 45 - 49 50 - 54 55 - 59	$\mathrm{{\rm I}{\rm I}{\rm I}}$ $\bcancel{\mathrm{{\rm I}{\rm I}{\rm I}{\rm I}}}$ $\bcancel{\mathrm{{\rm I}{\rm I}{\rm I}{\rm I}}}\mathrm{{\rm I}{\rm I}{\rm I}}$ $\bcancel{\mathrm{{\rm I}{\rm I}{\rm I}{\rm I}}}\bcancel{\mathrm{{\rm I}{\rm I}{\rm I}{\rm I}}}\mathrm{{\rm I}}$ $\bcancel{\mathrm{{\rm I}{\rm I}{\rm I}{\rm I}}}\mathrm{{\rm I}{\rm I}{\rm I}}$ $\bcancel{\mathrm{{\rm I}{\rm I}{\rm I}{\rm I}}}\mathrm{{\rm I}{\rm I}}$ $\bcancel{\mathrm{{\rm I}{\rm I}{\rm I}{\rm I}}}\mathrm{{\rm I}{\rm I}}$ $\mathrm{{\rm I}}$	3 5 8 11 8 7 7 1
		$\sum _{}f=50$