Answer
See below.
Work Step by Step
The mean of $n$ numbers is the sum of the numbers divided by $n$.
The range is the difference between the largest and the smallest data value. The standard deviation of $x_1,x_2,...,x_n$ is (where $\overline{x}$ is the mean of the data values): $\sqrt{\frac{(x_1-\overline{x})^2+(x_2-\overline{x})^2+...+(x_n-\overline{x})^2}{n}}$.
Hence here the mean is: $\frac{301+312+308+320+318+315+325+336}{8}=316.875$
Hence here the range is: $336-301=35$, and the standard deviation is: $\sqrt{\frac{(301-316.875)^2+(312-316.875)^2+...+(336-316.875)^2}{8}}\approx10.696$
