Bias (Estimator)
The bias of an Estimator 
is defined as
It is therefore true that
An Estimator for which
is said to be Unbiased.See also Estimator, Unbiased- Wallis Cosine Formula
- Wallis Formula
- Wallis's Conical Edge
- Wallis Sieve
- Wallis Sine Formula
- Wallis's Problem
- Wallpaper Groups
- Walsh Function
- Walsh Index
- Wang's Conjecture
- Ward's Primality Test
- Waring Formula
- Waring's Conjecture
- Waring's Prime Conjecture
- Waring's Problem
- Waring's Sum Conjecture
- Waring's Theorem
- Watchman Theorem
- Watson-Nicholson Formula
- Watson Quintuple Product Identity
- Watson's Formula
- Watson's Theorem
- Watt's Curve
- Watt's Parallelogram
- Wave