In a series where n observations is 3a, other n observations is −2a – InterviewSolution

1.	In a series where n observations is 3a, other n observations is −2a and the rest n observations is −a. If the variance of this set of observations is 42, then absolute value of a is
Answer» In a series where $n$ observations is $3 a$ , other $n$ observations is $- 2 a$ and the rest $n$ observations is $- a$ . If the variance of this set of observations is $42$ , then absolute value of $a$ is

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