Solve the equation
Question:

Let $\mathrm{x}_{1}, \mathrm{x}_{2}, \ldots ., \mathrm{x}_{\mathrm{n}}$ be $\mathrm{n}$ observations, and let $\overline{\mathrm{x}}$ be their arithmetic mean and $\sigma^{2}$ be their variance.

Statement-1 : Variance of $2 \mathrm{x}_{1}, 2 \mathrm{x}_{2}, \ldots, 2 \mathrm{x}_{\mathrm{n}}$ is $4 \sigma^{2}$.

Statement-2 : Arithmetic mean of $2 x_{1}, 2 x_{2}, \ldots ., 2 x_{n}$ is $4 \bar{x}$.

  1. Statement–1 is true, Statement–2 is false. 

  2. Statement–1 is false, Statement–2 is true. 

  3. Statement–1 is true, Statement–2 is true ; Statement–2 is a correct explanation for Statement–1. 

  4. Statement–1 is true, Statement–2 is true ; Statement–2 is not a correct explanation for Statement–1.


Correct Option: 1

Solution:

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