Glossary


Normal Distribution When data is normally distributed its shape is a bell curve.  The mean is the centre point of the curve, and half the results are higher than the mean, half lower.
Mean The measure of central tendancy we traditionally call the "average".  To find the mean, sum all the results, and divide by the number of results.
Trial # Result
1 14.25
2 13.16
3 15.13
4 12.21
Sum 54.75
Mean 13.69