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AP EAMCET201726 Apr 2017Morning ShiftMathematicsStatisticsActual

The variance of the following data is array cccccccc x_i & 6 & 10 & 14 & 18 & 24 & 28 & 30 f_i & 2 & 4 & 7 & 12 & 8 & 4 & 3 array

Options

  1. A33.4
  2. B34.3
  3. C43.4
  4. D44.3

Correct answer

C. 43.4

Step-by-step solution

aligned & Now, variance = f_i d_i^2 N - ( f_i d_i N )^2 & = 1 40 1776-1= 1736 40 =43.4 aligned

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