Answer the following questions in the spaces provided.

1			When a test result falls more than two standard deviations from the mean, how should you interpret it?
2			What term tells you where the middle of a set of samples falls?
3			Calculate the range of the following samples: 88.3, 88.9, 88.9, 88.2, 98.1, 93.3, 98.2.
4			What two values must you calculate in order to set limits for the normal range of test results?
5			What is sigma? What does it mean in statistics?
6			How is the mean represented? How is it calculated? What is the math symbol for the term mean?
7			Why is the range not used to measure variation of test results in POLs?
8			What units are used for the mean and standard deviation?
9			What is the formula for the coefficient of variation?
10			What is the purpose of calculating the coefficient of variation?
11			What is another term for the coefficient of variation?
12			In what mathematical measurement is the coefficient of variation reported in the laboratory?
13			What do these symbols mean? ∑; n; x; √