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JEE Mains · Maths · STD 11 - 13. statistics

यदि \(50\) प्रेक्षणों \(x _{1}, x _{2} \ldots, x _{50}\) का माध्य तथा मानक विचलन दोनों \(16\) है, तो \(\left(x_{1}-4\right)^{2},\left(x_{2}-4\right)^{2}, \ldots \cdots\) \(\left( x _{50}-4\right)^{2}\) का माध्य है

  1. A \(400\)
  2. B \(380\)
  3. C \(525\)
  4. D \(480\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(400\)

Step-by-step Solution

Detailed explanation

Mean \(\left( \mu \right) = \frac{{\sum {{x_i}} }}{{50}} = 16\) Standard deviation \(\left( \sigma \right) = \sqrt {\frac{{\sum {x_i^2} }}{{50}} - {{\left( \mu \right)}^2}} = 16\) \( \Rightarrow \left( {256} \right) \times 2 = \frac{{\sum {x_i^2} }}{{50}}\) \(\Rightarrow\) New…
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