Step 1
Given;
[tex]\begin{gathered} mean=\mu=1180 \\ Standard\text{ Deviation=}\sigma=300 \end{gathered}[/tex]Step 2
Using the empirical rule;
[tex]P(\mu-\sigmaA) Hence, approximately 68% of men have cranial capacities between 880cc and 1480cc.[tex]\begin{gathered} P(\mu-2\sigmaB) Hence approximately 95% of men have cranial capacities between 580cc and 1780cc.