PDF Indicator

 
Does anyone here know about the PDF Indicator and how it works, a brother needs help
 

PDF is Probability Density Function (from wikipedia here).

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Probability density function - Wikipedia
Probability density function - Wikipedia
  • en.wikipedia.org
In probability theory, a probability density function (PDF), or density of a continuous random variable, is a function whose value at any given sample (or point) in the sample space (the set of possible values taken by the random variable) can be interpreted as providing a relative likelihood that the value of the random variable would equal...