Unbiasedness

Unbiasedness in statistics refers to a property of an estimator (a method for making estimates) where, on average, it correctly reflects the true value of what is being measured. In other words, if you used the same estimation process many times, the average of all those estimates would be close to the real value. It doesn't guarantee each individual estimate is exactly correct, but over many attempts, there’s no systematic error or tendency to overestimate or underestimate. This quality ensures that the estimator provides fair and accurate results over the long run.