Chapter 19
More on Probability
IN THIS CHAPTER
Understanding the beta distribution
Pursuing Poisson
Grappling with gamma
Speaking exponentially
In Chapter 18, I delve into probability in a semiformal way and introduce distributions of random variables. The binomial distribution is the starting point. In this chapter, I examine additional distributions.
One of the symbols on the pages of this book (and other books in the For Dummies series) lets you know that “technical stuff” follows. It might have been a good idea to hang that symbol above this chapter’s title. Here’s a minor note of caution: Some mathematics follows. I’ve added the math to help you understand what you’re doing when you work with the dialog boxes of the Excel functions I describe.
Are these functions on the esoteric side? Well … yes. Will you ever have occasion to use them? Well … you just might.
Discovering Beta
The beta distribution (not to be confused with beta, the probability of a Type 2 error) is a sort of chameleon in the world of distributions. It takes on a wide variety of appearances, depending on the ...
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