Difference of Successes
If 
and 
are the observed proportions from standard Normally Distributedsamples with proportion of success 
, then the probability that
 | (1) |
 | (2) |
 |  |  | (3) |
 | |  | (4) |
 | |  | (5) |
Here,
is the Unbiased Estimator. The Skewness and Kurtosis of this distribution are |  |  | (6) |
 | |  | (7) |
- Spherical Sector
- Spherical Segment
- Spherical Shell
- Spherical Spiral
- Spherical Symmetry
- Spherical Tessellation
- Spherical Triangle
- Spherical Trigonometry
- Spherical Vector Harmonic
- Spheroid
- Spheroidal Harmonic
- Spheroidal Wavefunction
- Sphinx
- Spider and Fly Problem
- Spider Lines
- Spiegeldrieck
- Spieker Center
- Spieker Circle
- Spigot Algorithm
- Spijker's Lemma
- Spindle Cyclide
- Spindle Torus
- Spinode
- Spinor
- Spiral