$$\textbf{Step 1: Find the average by adding all the observation and divide it by number of observations.}$$
$$\text{Average}=\dfrac{60+62+61+60+59+63+70+58}{8}$$
$$\Rightarrow \text{Average}=\dfrac{493}{8}$$
$$\Rightarrow \text{Average}=61.62$$
$$\textbf{Hence, average skipping in one minute is }\boldsymbol{61.62}$$