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JEE Mains · Maths · STD 11 - 13. statistics

જો \(\mathop \sum \limits_{i = 1}^9 \left( {{x_i} - 5} \right) = 9\) અને \(\mathop \sum \limits_{i = 1}^9 {\left( {{x_i} - 5} \right)^2} = 45,\) તો અવલોકનો \({x_1},{x_2},\;.\;.\;.\;,{x_9}\) નું પ્રમાણિત વિચલન . . . . છે.

  1. A \(4\)
  2. B \(2\)
  3. C \(3\)
  4. D \(9\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(2\)

Step-by-step Solution

Detailed explanation

Given \(\sum\limits_{i = 1}^9 {\left( {{x_i} - 5} \right)} = 9 \Rightarrow \sum\limits_{i = 1}^9 {{x_i} = 54\,\,\,.....\left( i \right)} \) Also, \(\sum\limits_{i = 1}^9 {{{\left( {{x_i} - 5} \right)}^2}} = 45\)…
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