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AP EAMCET202423 May 2024Morning ShiftMathematicsStatisticsActual

If the mean of the data 7,8,9,7,8,7, , 8 is 8 then variance of the data

Options

  1. A2
  2. B7 8
  3. C9 8
  4. D1

Correct answer

D. 1

Step-by-step solution

Mean = 7+8+9+7+8+7+ +8 8 aligned & 8= 54+ 8 64=54+ =10 & Variance = [ array l (7-8)^2+(8-8)^2+(9-8)^2+(7-8)^2 +(8-8)^2+(7-8)^2+(10-8)^2+(8-8)^2 array ] 8 & = 1+0+1+1+0+1+4+0 8 =1 . aligned

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