Answer
Variance:925.14
Standard deviation:30.42
Range:79.
Work Step by Step
By using the results from before: $\mu=50.36.$
Variance=$\frac{\sum (x-\mu)^2}{n}=\frac{(11-50.36)^2+(3-50.36)^2+...+(2-50.36)^2}{11}=925.14.$
Standard deviation=$\sqrt{variance}=\sqrt{925.14}=30.42$
Range=maximum value-minimum value=88-9=79$.
