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AP EAMCET201922 Apr 2019Morning ShiftMathematicsStatisticsActual

The coefficient of variation of (9,3,11,5,7 ), is

Options

  1. A( 100 2 7 )
  2. B( 200 2 3 )
  3. C( 200 2 7 )
  4. D( 100 2 3 )

Correct answer

C. ( 200 2 7 )

Step-by-step solution

Given numbers are 9, 3, 11, 5, 7. Now, mean (( x )= 9+3+11+5+7 5 = 35 5 =7 ) Variance ( ^2= 1 5 (9^2+3^2+11^2+5^2+7^2 )-(7)^2 ) ( aligned & = 1 5 (81+9+121+25+49)-49 & = 285 5 -49=57-49=8 aligned ) ( ) Coefficient of variation ( ^2 x 100= 8 7 100= 200 2 7 )

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