Applying the principles of probability theory to a linear inverse problem

4 Applying the principles of probability theory to a linear inverse problem 

Some forniular and noUiUons from, prohabditi/ lhairi/ 

In jiarticular. we have for a discre tc random variable the following e()uality  

A variance. V of the discrete random variable d. describes the deviation of d. from its mean value. It is calculated by the formula 

The value j is sometimes called the standard deviation of data d. 

---