CBSE Class 11-science Answered

Asked by Topperlearning User | 15 Nov, 2016, 04:08: AM

Expert Answer

Class interval	x	f	xf	d=\|x-mean\|	fd
0-10	5	5	25	22	110
10-20	15	8	120	12	96
20-30	25	15	375	2	30
30-40	35	16	560	8	128
40-50	45	6	270	18	108
total		50	1350		472

$M e a n equals fraction numerator begin display style stack sum f subscript i x subscript i with i below end style over denominator begin display style sum for i of end style f subscript i end fraction equals 1350 over 50 equals 27 M e a n space D e v i a t i o n equals fraction numerator 1 over denominator sum for i of f subscript i end fraction stack sum f subscript i d subscript i with i below equals 472 over 50 equals 9.44$

Class interval	x	f	cf	d=\|x-median\|	fd
0-10	5	5	5	20	100
10-20	15	8	13	5	40
20-30	25	15	28	0	0
30-40	35	16	44	10	160
40-50	45	6	50	20	120
total		50			420

$N equals 50 rightwards double arrow N over 2 equals 25 T h e space c u m u l a t i v e space f r e q u e n c y space g r e a t e r space t h a n space 25 space i s space 28 space a n d space c o r r e s p o n d i n g space x space i s space 25 s o space m e d i a n space i s space 25. M e a n space d e v i a t i o n equals fraction numerator begin display style stack sum f subscript i d subscript i with i below end style over denominator begin display style stack sum f subscript i with i below end style end fraction equals 420 over 50 equals 8.4$

Answered by | 15 Nov, 2016, 06:08: AM

CBSE Class 11-science Answered

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CBSE Class 11-science Answered

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