Mean (average) day 2

Second day of average.  It's basically this simple:

1. add up all of the data points (numbers)
2. divide the total by however many numbers there were.

Example:

Let's say Mr. Flaten sits at a stop light and times how long he waits each time.  Let's pretend there were five lights and the times (in seconds) were:  7, 13, 10, 5, and 15.

How long would I wait on average?

1. Add up the numbers, the total is: 50 seconds
2. Divide by the five stop lights, so 50 divided by 5.  The average time waiting at a light would be 10 seconds.

The second factor would be an outlier.  That's when there is a number or numbers that are way outside of the "normal" range of numbers in the set.  For example, if I have to wait at a stop light for 62 seconds because of a police vehicle, it would increase my average, but not really be a true representation of the mean.

Here's tonight's assignment: Section 5.4 Puzzle time sheet.

Found a youtube video that might help: http://www.youtube.com/watch?v=tgxZfQDf4qY