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Statistics question

2021 · 26 Aug · Shift 1 · Q23
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  5. /2021 · 26 Aug · Shift 1 · Q23

Statistics question

2021 · 26 Aug · Shift 1 · Q23

JEE MainMathematicsStatisticsMCQ+4 / −1
The mean and standard deviation of 20 observations were calculated as 10 and 2.5 respectively. It was found that by mistake one data value was taken as 25 instead of 35. if α\alphaα and β\sqrt \betaβ​ are the mean and standard deviation respectively for correct data, then (α\alphaα, β\betaβ) is :
  1. A
    (11, 26)
  2. B
    (10.5, 25)
  3. C
    (11, 25)
  4. D
    (10.5, 26)
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