Statistical Investigations on Variability and Heredity

Statistical investigations into isiZulu intonation

We study the relationship between lexical tone and measured values of fundamental frequency for several word classes in isiZulu, based on objective measurements from recordings of three speakers. For nouns and adjectives, both in isolation and in sentence context, a relatively invariant pattern of fundamental frequencies is observed. This observation is in apparent conflict with the range of to...

Investigations on inter-speaker variability in the feature space

We apply Fisher variate analysis to measure the e ectiveness of speaker normalization techniques. A trace criterion, which measures the ratio of the variations due to di erent phonemes compared to variations due to di erent speakers, serves as a rst assessment of a feature set without the need for recognition experiments. By using this measure and by recognition experiments we demonstrate that ...

Distribution, Variability, and Statistical Significance

Radiation effects on human heredity.

In experimental organisms such as fruit flies and mice, increased frequencies in germ cell mutations have been detected following exposure to ionizing radiation. In contrast, there has been no clear evidence for radiation-induced germ cell mutations in humans that lead to birth defects, chromosome aberrations, Mendelian disorders, etc. This situation exists partly because no sensitive and pract...

on some bayesian statistical models in actuarial science with emphasis on claim count

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