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CBSE Class 11-science Answered

M a r k s space o b t a i n e d space b y space 5 space s t u d e n t s space a r e space a s space f o l l o w s colon
95 space comma space 80 space comma space 85 space comma space 92 space comma space 100
F i n d space t h e space c o e f f i c i e n t space o f space v a r i a t i o n.

Please provide solution to this question Please provide solution to this question
Asked by Topperlearning User | 19 Nov, 2016, 02:29: AM
Expert Answer

x with bar on top equals fraction numerator 95 plus 80 plus 85 plus 92 plus 100 over denominator 5 end fraction equals 452 over 5 equals 90.4
sigma equals square root of fraction numerator 95 squared plus 80 squared plus 85 squared plus 92 squared plus 100 squared over denominator 5 end fraction minus 90.4 squared end root
equals square root of 41114 over 5 minus 8172.16 end root
equals square root of 8222.8 minus 8172.16 end root
equals square root of 50.64 end root
equals 7.11
C. V equals fraction numerator sigma over denominator x with bar on top end fraction equals fraction numerator 7.11 over denominator 90.4 end fraction equals 0.079 space o r space 7.9 percent sign

Answered by | 19 Nov, 2016, 04:29: AM
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