Mathematics · 2013
JEE Main · 25 April 2013, Shift 1 · Q86
In a set of 2n observations, half of them are equal to 'a' and the remaining half are equal to ' -a '. If the standard deviation of all the…
In a set of 2n observations, half of them are equal to 'a' and the remaining half are equal to '$\displaystyle -a$'. If the standard deviation of all the observations is $\displaystyle 2$ ; then the value of
$\displaystyle |a|$ is :
Official answer
(1)
$\displaystyle 2$
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JEE Main 2013 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.