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KCET2021MathematicsStatistics

The standard deviation of the numbers 31 , 32,33 46,47 is

Options

  1. A17 12
  2. B47²-1 12
  3. C2 6
  4. D4 3

Correct answer

C. 2 6

Step-by-step solution

Given, numbers : 31,32,33, , 46,47 . The standard deviation of 31,32,33, , 47 will be the same as those of 1,2,3, , 17 . (decreasing each item by 30 ) SD = n²-1 12 Here, n=17 aligned SD &= 17²-1 12 = 288 12 &= 24 =2 6 aligned

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