Question Number 79089 by TawaTawa last updated on 22/Jan/20
Commented by mr W last updated on 22/Jan/20
$${set}\:\mathrm{2}: \\ $$$${standard}\:{deviation}\:\sigma_{\mathrm{2}} =\mathrm{2}\sigma_{\mathrm{1}} =\mathrm{2}×\mathrm{3}.\mathrm{5}=\mathrm{7} \\ $$$${variance}\:\sigma_{\mathrm{2}} ^{\mathrm{2}} =\mathrm{7}^{\mathrm{2}} =\mathrm{49} \\ $$
Commented by TawaTawa last updated on 23/Jan/20
$$\mathrm{God}\:\mathrm{bless}\:\mathrm{you}\:\mathrm{sir} \\ $$