pgeom  function

This function returns the value of the geometric cumulative density function. Also, this function is used to find the probability of experiencing a certain amount of failures or fewer before experiencing the first success in a series of Bernoulli.

Syntax: pgeom(q, prob) 

Parameters: 

• q: number of failures before the first success  
• prob: probability of success on a given trial

Example:

In this example, we are calculating the probability of a man asking for help, and the probability of getting the help is 0.6(p=0.6) so with the use of the pgeom() function we are calculating the probability that the person will have to talk to 8 or less people to find someone who helps.

Output:

[1] 0.9997379

The probability that the person will have to talk to 8 or less people to find someone who supports the law is 0.9997379

In this article, we will be looking at a guide to the dgeom, pgeom, qgeom, and rgeom methods of the geometric distribution in the R programming language.