| brewings ( @ 2006-04-26 19:16:00 |
| Current mood: |
pet peeve # 3 - ambiguous definitions
Degrees of freedom can be defined as:
- the number of independent pieces of information that go into the estimate of a parameter
- the number of values in the final calculation of a statistic that are free to vary
- the number of independent components minus the number of parameters estimated
- measure of variability which merely expresses the number of options available within a variable or space
- (my favorite) a mathematical property of a distribution related to the number of values in a sample that can be freely specified once you know something about the sample
This reminds me the abstract instructions they used to put on electric appliances with one button - "the operation of this electric appliance is performed by compressing the red-colored knob at the front of the appliance". These instructions are also known as "Push the red button!".