The variance of the following data is x_{i} 6 10 14 18 24 28 30 f_{i} 2 4 7 12 8 4 3

AP EAMCET Engineering 26 Apr 2017 Shift 1 Paper

Section: Mathematics

Question : 35 of 160

Marks: +1, -0

The variance of the following data is

xi	6	10	14	18	24	28	30
fi	2	4	7	12	8	4	3

xi	fi	di=xi−a	di2	fidi	fidi2
6	2	-12	144	-24	288
10	4	-8	64	-32	256
14	7	-4	16	-28	112
18=a	12	0	0	0	0
24	8	6	36	48	288
28	4	10	100	40	400
30	3	12	144	36	432
	N=∑fi=40			40	1776

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