Hi! I've been trying to figure out which formula is used for the mean because it is more than a basic average. Using the information below, how would...

Hi! I've been trying to figure out which formula is used for the mean because it is more than a basic average. Using the information below, how would I find the 15 in the denominator? There are 30 teams total.

Refer to the Baseball 2012 data. Compute the mean number of home runs per game. To do this, first findthe mean number of home runs per team for 2012. Next, divide this value by 162 (a season...