| An average of n numbers computed by adding some function of the numbers and dividing by some function of n | |
| Experimental results caused by expectations alone; any effect on behavior caused by the administration of an inert substance or condition, which is assumed to be an active agent | |
| Analytical technique that accounts for the number of acceptable errors in an experiment. | |
| A random variable that may assume either a finite number of values or an infinite sequence of values |