Looking up probabilities once was a time-consuming, complex, and error-prone task. Virtually every statistics book has tables of various probability distributions in an appendix, but R provides a family of functions for both discrete and continuous probability functions, making the use of tables unnecessary. You have already seen the rnorm() function used to produce random numbers that simulate a normal distribution with a certain mean and standard deviation. The functions for other probability distributions are all similarly labeled to make it easy to remember them.
In this chapter, you will learn how to use ...