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JEE Mains · Maths · STD 11 - 13. statistics

જો \(5\) અવલોકનો \(x_1 ,x_2 ,x_3 ,x_4 ,x_5\) નો મધ્યક અને પ્રમાણિત વિચલન અનુક્રમે \(10\) અને \(3\) હોય તો \(6\) અવલોકનો \(x_1 ,x_2 ,.....,x_5\) અને \(-50\) નો વિચરણ ......... થાય 

  1. A \(509.5\)
  2. B \(586.5\)
  3. C \(582.5\)
  4. D \(507.5\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(507.5\)

Step-by-step Solution

Detailed explanation

\(\sum {x = 50} \) \({\left( 3 \right)^2} = \frac{1}{5}\left( {e{x^2} - \frac{{{{\left( {ex} \right)}^2}}}{5}} \right)\) \(9 = \frac{1}{5}\left( {\sum {{x^2} - \frac{{2500}}{5}} } \right)\) \(\therefore \sum {{x^2} = 545} \) New variable…
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