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JEE Mains · Maths · STD 11 - 13. statistics

જો સંખ્યાઓ k, 2k, 3k,..., 1000k નું મધ્યસ્થ સાપેક્ષ સરેરાશ વિચલન 500 હોય, તો \(k ^2\) = ___ .

  1. A 16
  2. B 4
  3. C 1
  4. D 9
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Answer & Solution

Correct Answer

(B) 4

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Detailed explanation

\(\because\) median \(=\frac{1001 k }{2}= X _{ M }\) \(\therefore\) mean deviation about median \(=\frac{\sum\left| X _{ i }- X _{ M }\right|}{ n }\) \(=\frac{2\left(\frac{ k }{2}+\frac{3 k }{2}+\frac{5 k }{2}+\ldots 500 \text { terms }\right)}{1000}\)…
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