Bimodal distribution

A bimodal distribution is a probability distribution of the mathematics or the frequency distribution in which the density or the estimation has two modes. It is a multimodal distribution (also mehrgipflig ), in contrast to the unimodal distribution because it has more than one maximum. A bimodal distribution may be either symmetrical or asymmetrical.

Bimodal distributions occur in many people viewed situations. Often, the fact that the investigated group are two different groups, responsible for the two modes. Represented dignity, for example, the proportion of red cells in the blood of a group of people in a frequency distribution, so, there would be two modes, since men generally have a higher proportion.

Meaning has a bimodal distribution, because the underlying data can be very well be divided into two classes. This is usually done by choosing a threshold in the minimum between the two maxima. Applies such a method for example in the binarization of images, a variety of segmentation, in which only two segments are produced, for example by using a threshold value method.

More difficult than usual, the words of confidence intervals for random variables with a multimodal distribution. It needs (eg symmetrical ) are also specified in order to describe it clearly.