Answer
Variance:$101.12\ (deaths)^2$. Standard deviation:$10.06 \ deaths$ Range:$28 \ deaths$.
Work Step by Step
The mean can be counted by summing all the data and dividing it by the number of data: $\frac{78+81+95+73+69+79+92+73+90+97}{10}=82.7$: $\mu=82.7 \ deaths.$ Variance=$\frac{\sum (x-\mu)^2}{n}=\frac{(78-82.7)^2+(81-82.7)^2+...+(97-82.7)^2}{10}=101.12\ (deaths)^2.$ Standard deviation=$\sqrt{variance}=\sqrt{101.12\ (deaths)^2}=10.06 \ deaths$ Range=maximum value-minimum value=$97 \ deaths-69 \ deaths=28 \ deaths$.
