-- Multiply the first averages by the number of observation for each set of these. -- Add up the sets of averages. -- Divide the sum by the total number of observations (Add cardinaility of each...
Imagine 12 results for average rainfall each month, then the average of all the months combined would give the average rainfall during that year.
According to the National Center for Health Statistics, the average weight for an adult male in the United States is 189.8 pounds.
You would add all the numbers or scores out and then divide by how many scores you added.
355 horsepower