bimodal distribution


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bimodal distribution

[bīmo′dəl]
Etymology: L, bis + modus, measure
the distribution of quantitative data into two clusters. It is suggestive of two separate normally distributed populations from which the data are drawn.
Bimodal distributionclick for a larger image
Fig. 65 Bimodal distribution . The peaks (or modes) represent the character values of height and weight for men and women.

bimodal distribution

a statistical pattern in which the frequencies of values in a sample have two distinct peaks, even though parts of the distribution may overlap. For example, the sexual differences between men and women for such characters as height and weight produce a bimodal distribution.

bimodal distribution

a distribution with two peaks separated by a region of low frequency of observations.
References in periodicals archive ?
If this assumption is wrong, we would have expected a less pronounced bimodal distribution of breath [delta][sup.
This is an example of the general confusion/ignorance regarding the 2 types of D-dimer units in use, as is the bimodal distribution and remarkably high CV detected in the initial evaluation of the 2004 D-dimer proficiency testing data, resulting in the investigation of D-dimer assay practices reported in this study.
This reasoning thus predicts that the twin peaks of the bimodal distribution should become even more pronounced for tournament games.
The bimodal distribution of dispersal distances may be due to an under-representation of PDs that are hours to days long (the time needed for a passively drifting organism to travel 1 to 10 km; Fig.
The observed distribution changes from a normal distribution, to a slightly bimodal distribution, to a strongly positively skewed distribution throughout the growing season in both the natural population and the refined model.
In order to assess if a bimodal distribution was present, the thin and intermediate size ranges denoted for this subject were combined, and the fibers re-classified and then assessed via a Kruskal-Wallis one way ANOVA--as the assumptions of normality were not met.
The molecular-weight distribution of EU rubber showed a typical bimodal distribution.
The distinct differences in how faculty and staff perceive these items are important to investigate, as the bimodal distribution highlights the strong heterogeneity between and among the groups of faculty and staff.
There was little variation in the Prob1 value, which indicates the probability of a kernel to be in the putative subpopulation 1 (with smaller kernel size) of the bimodal distribution.
Results: The distribution frequency histogram of CYP2D6 metabolic ratios (MRs) showed a bimodal distribution with a gap between the metabolic ratios of 0.
This bimodal distribution could be the reflection of the three-layer microstructures and need further evaluation.