Let $x_1,x_2,......,x_n$be n observations, and let $\overline{x}$be their arithematic mean and ${\sigma }^2$be their variance.Statement 1: Variance of $2x_1,2x_2,......,2x_{n}is4{\sigma }^2$.Statement 2: Arithmetic mean of $2x_1,2x_2,......,2x_{n}is4x$ .

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