Question

use the raw data of 24 tobacco workers to create 5 classes: 55, 51, 44, 42, 37, 38, 36, 39, 44, 43, 40, 40, 32, 39, 41, 58, 42, 39 40, 46, 37, 35, 41, 39. Then findthe tally, frequency, class boundary, class mid point, relative frequencies,percentage and cumulative frequencies. Plot on a bar graph after.

Answer 1

			Class boundary	Frequency (f)	Mid point=(upper class boundary+lower class boundary)/2	Relative frequency(R.F.)=f/24	Percentage=R.F.*100	Cumulative Frequency
Maximum=	58		32-37.2	5	34.6	0.2083	20.83	5
Minimum=	32		37.2-42.4	12	39.8	0.5	50	17
Range=	26		42.4-47.6	4	45	0.1667	16.67	21
No. of classes (k)=	5		47.6-52.8	1	50.2	0.0417	4.17	22
Width=Range/k=	5.2		52.8-58	2	55.4	0.0833	8.33	24