This method can distinguish between unimodal and bimodal distributions when the underlying distributions are known. Baker proposed a transformation to convert a bimodal to a unimodal distribution. But often the distribution of ecotypes is bimodal or multimodal. Important bimodal distributions include the arcsine distribution and the beta distribution. Some devices produce Gaussian energy distributions, whereas others can be bimodal. This distribution is a useful model for symmetric bimodal processes. Alkali basalts and bimodal volcanism are common products of rift-related magmatism. Categorical, continuous, and discrete data can all form bimodal distributions . Under this classification bimodal distributions are classified as type S or U. Bimodal distributions occur both in mathematics and in the natural sciences. The situation is more simple in bimodal alloys which have two distinct particle populations. Figure 2 and Figure 3 illustrate bimodal distributions. Laryngeal papillomatosis is a rare disease with a bimodal distribution based on age of incidence. In statistics, a bimodal distribution is a probability distribution with two different modes. Sediments are usually distributed in a bimodal fashion.