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JEE Mains · Maths · STD 11 - 13. statistics

જો આપેલ આવ્રુતિ વિતરણનો વિચરણ \(50\) હોય તો \(x\) ની કિમત મેળવો.
Class \(10-20\) \(20-30\) \(30-40\)
Frequency \(2\) \(x\) \(2\)

  1. A \(4\)
  2. B \(-2\)
  3. C \(-4\)
  4. D \(2\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(4\)

Step-by-step Solution

Detailed explanation

Variance is independent of shifting of origin \(\Rightarrow y_{i}: 15 \quad 25 \quad 35 \;\; or\;\;-10 \quad 0 \quad 10\) \(\Rightarrow f_{i}: 2 \quad \;\;\;x \quad \;2 \;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\; 2 \quad \;\;x \quad \;2\) \(\Rightarrow \quad\) Variance…
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