JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Tests to Detect Changes in Micro-Flora Composition;
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Tests to Detect Changes in Micro-Flora Composition;
Kim, Donguk; Yang, Mark C.K.;
  PDF(new window)
 Abstract
Good`s lambda test, a permutation test used to detect the changes of microorganism composition under two pathological conditions, has been quite popular for studying the micro-flora responsible for periodontal disease. A vast number of different micro-flora in the mouth renders the traditional chi-square test inapplicable. The main purpose of this paper is to evaluate the power of this test so that the sample size can be determined at the design stage. The robustness of this test and its comparison to two other intuitive tests are also presented. It is found that a permutation test based on likelihood ratio is more powerful than the lambda test in our simulated cases.
 Keywords
closeness;composition;lambda test;likelihood ratio;permutation test;power;
 Language
English
 Cited by
 References
1.
Journal of Animal Ecology, 1943. vol.12. pp.42-58 crossref(new window)

2.
Journal of Statistical Computation and Simulation, 1982. vol.15. pp.81-84 crossref(new window)

3.
Permutation tests, 1994.

4.
Annals of Mathematical Statistics, 1952. vol.23. pp.169-192 crossref(new window)

5.
Continuous univariate distribution-1, 1970.

6.
Communications of the ACM, 1988. vol.31. pp.742-749 crossref(new window)

7.
Infection and Immunity, 1982. vol.38. pp.651-667

8.
Journal of Clinical Periodontology, 1991. vol.18. pp.729-739 crossref(new window)

9.
J. Dental Research, 1981. vol.60. pp.486