#### Answer

Range:36 years, variance:94.5 years, standard deviation: 9.72 years..

#### Work Step by Step

Range is the difference of the maximum and minimum of the set: range=36-0=36 years. Calculated by calculator, the mean is: 15.03 years. The variance is the sum of the differences of each value and the mean on the power of two, divided by the number of values minus 1: variance=$\frac{(10-15.03)^2+(29-15.03)^2+...+(23-15.03)^2}{50-1}=94.5$ years. The standard deviation is the square root of the variance: standard deviation=$\sqrt{94.5}=$9.72 years.