The variance of 20 observations is 5 . If each observation is multiplied by 2 , then variance of resulting…
The variance of 20 observations is 5 . If each observation is multiplied by 2 , then variance of resulting observations is
- $5$
- $10$
- $4$
- $20$
Solution
When each term of a data is multiplied by $\lambda$, variance is multiplied by $\lambda^2$.
$\therefore \quad$ New variance $=2^2 \times 5=20$
Asked in: MHT CET 2023 (14 May Shift 1)
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