Judo should be called Kodokan Judo. It was developed by Professor Jigoro Kano in 1882. Professor Kano was a student of many of the old masters of Jujitsu when he realized that the arts were disappearing.
The definition of unbiased is a neutral person or persons. An example of unbiased is a jury with no prior knowledge of the case upon which they are deciding. or unÂ·biâ²assed. without bias or prejudice; objective; impartial.
and substituting the estimate for gives. which is an unbiased estimator of the variance of the mean in terms of the observed sample variance and known quantities. Note that, if the autocorrelations are identically zero, this expression reduces to the well-known result for the variance of the mean for independent data.