(Solved) Show that if the numbers x_1,x_2,... ,x_n have a mean x̄, a variance s 2 and a coefficient of variation γ then k times these numbers, that
Question: Show that if the numbers \[{{x}_{1}},{{x}_{2}},\ldots ,{{x}_{n}}\] have a mean \[\bar{x}\] , a variance s 2 and a coefficient of variation \[\gamma \] then k times these numbers, that is \[k{{x}_{1}},k{{x}_{2}},\ldots ,k{{x}_{n}}\] have a mean \[k\bar{x}\] , a variance ks 2 and a coefficient of variation \[\gamma \] .
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