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MHT CET202124 Sep 2021Evening ShiftMathematicsStatisticsActual

For the set of 50 observation, the sum of their squares is 3050 , their arithmetic mean is 6 . Hence the standard deviation of these observations is

Options

  1. A5
  2. B3
  3. C4
  4. D6

Correct answer

A. 5

Step-by-step solution

We have n =50, x _ i ^2=3050, x =6 aligned & S.D. = 1 n x_i^2-( x )^2 & = 3050 50 -(6)^2 = 61-36 = 25 =5 aligned

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