Microsoft Office Tutorials and References

In Depth Information

Exhibit 8.8
Binomial probability distribution example

Exhibit 8.9
Bimodal distribution

terminology uses the deﬁnition of the mode (the maximum occurring value)

loosely, but it is generally accepted that a bimodal distribution need not have

equal probability for local modes. Additionally, some distributions are sym-

metrical in shape (Normal or Uniform), while others need not be (Poisson,

Beta, or Binomial).

b.
Behavior of uncertain events
. Often, we must assume particular behavior in

order to justify using certain distributions. For example, in a Poisson arrival

process, the arrivals are deﬁned to be independent of one another, they occur

at random, and the average number of events over a unit of time (or space) is

constant. (More on the Poisson in the next section.) Even when we
bend
the

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