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Statistics question

2020 · 8 Jan · Shift 2 · Q24
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Statistics question

2020 · 8 Jan · Shift 2 · Q24

JEE MainMathematicsStatisticsMCQ+4 / −1
The mean and variance of 20 observations are found to be 10 and 4, respectively. On rechecking, it was found that an observation 9 was incorrect and the correct observation was 11. Then the correct variance is
  1. A
    3.98
  2. B
    3.99
  3. C
    4.01
  4. D
    4.02
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