If _ i=1 ^ 2 (x_ i -5 )=9 and _ i=1 ^ 2 (x_ i -5 )^ 2 =45 , then the standard deviation…
Mathematics · JEE Main · NTA Exams — Statistics and Probability
If \(\sum_{i=1}^{2}\left(x_{i}-5\right)=9\) and \(\sum_{i=1}^{2}\left(x_{i}-5\right)^{2}=45\), then the standard deviation of the 9 terms x1, x2, ..., x9 is:
- 2
- 3
- 9
- 4
Answer
(A) 2
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