Sample Variance
To estimate the population Variance from a sample of 
elements with a priori unknown Mean (i.e.,the Mean is estimated from the sample itself), we need an unbiased Estimator for 
. This is thek-Statistic 
, where
 | (1) |
is the sample variance | (2) |
 | (3) |
- Nöther
- Obelus
- Object
- Oblateness
- Oblate Spheroid
- Oblate Spheroidal Coordinates
- Oblate Spheroidal Wave Function
- Oblate Spheroid Geodesic
- Oblique Angle
- Oblong Number
- Obstruction
- Obtuse Angle
- Obtuse Triangle
- Ochoa Curve
- Octacontagon
- Octadecagon
- Octagon
- Octagonal Number
- Octagram
- Octahedral Graph
- Octahedral Group
- Octahedral Number
- Octahedron
- Octahedron 5-Compound
- Octahemioctacron