00:01
So in this problem, we're told to determine the average afternoon wait time and security lines at the airport, officials monitored four passengers, each at a different gate.
00:10
The time each passenger entered the security line, and the time the same passenger cleared the checkpoint was recorded, as shown in the table that you have in your book.
00:18
So what we want to find is the average or the mean of the wait time for these passengers.
00:24
Well, the first one we have to find is the wait time for each passenger.
00:27
So let's first start with the passenger gate a.
00:30
Well, they entered the security checkpoint at 305, and they cleared it at 321.
00:37
Well, that means they were in there for 16 minutes.
00:40
So the wait time for passenger a is 16 minutes.
00:45
Now we can do the same thing for the passenger gate b.
00:48
They entered at 303 p .m...