A) 2
B) \[\sqrt{2}\]
C) 4
D) \[2\sqrt{2}\]
Correct Answer: A
Solution :
Clearly mean A =0 Now, standard deviation \[\sigma =\sqrt{\frac{\Sigma {{(x-A)}^{2}}}{2n}}\] \[2=\sqrt{\frac{{{(a-0)}^{2}}+{{(a-0)}^{2}}+.....+{{(0-a)}^{2}}+.......}{2n}}\] \[=\sqrt{\frac{{{a}^{2}}.2n}{2n}}=|a|\]Hence,\[|a|=2\]You need to login to perform this action.
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