Question: Thirty students in an experimental psychology class used various techniques to train a rat to move through a maze. At the end of the course, each student's rat is timed through the maze.  The mean time that it took the rats to traverse the maze was 13.7 seconds with a standard deviation of 2.2 seconds. Using the 68 - 95-99.7 Rule , determine the following:

1. What percentage of these rats made it through the maze in less than 9.3 seconds.
2. What percentage took longer than 15.9 seconds?
3. What is the probability that a particular rat took between 9.3 and 18.1 seconds?
4. What percentage of the rats took between 7.1 and 20.3 seconds?
5. What is the length time a particular rat took if only 2.5% of all times are shorter?
6. How many of the rats took less than 7.1 seconds or more than 20.3 seconds?

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