how do you calculate the variance of an underlying process? how to calculate variance on a normal sample what is the underlying process variance is it possible to use an underlying sampling technique? what is underlying process variance what is an example of an underlying process? how does this work? why are underlying processes rayleigh-distributed what is typical underlying sampling? what would you use to calculate variance? how to get the variance of a shooting target how to estimate variance in a shot how do you determine variance in a normal sample? what is the underlying process how do you estimate variance in a shot why do we need to measure underlying sample which sample is considered a central sampling point how can you get sample variance what does the sample center measure? can you estimate the variance of a standard sample which sample has a symmetric normal distribution why do we measure variance in a normal sample