Wilcoxon''s ranksum test, Advanced Statistics

Wilcoxon's ranksum test is the distribution free method or technique used as an alternative to the Student's t-test for assessing whether two populations have the same location. Given the sample of observations from each population, all observations are ranked as if they were from the single sample and the test statistic Wis the sum of ranks in the smaller group. Equivalent to Mann-Whitney test. The tables giving critical values of test statistic are available, and for the moderate and large sample sizes, a normal estimate can be used. 

Posted Date: 8/1/2012 1:54:05 AM | Location : United States







Related Discussions:- Wilcoxon''s ranksum test, Assignment Help, Ask Question on Wilcoxon''s ranksum test, Get Answer, Expert's Help, Wilcoxon''s ranksum test Discussions

Write discussion on Wilcoxon''s ranksum test
Your posts are moderated
Related Questions
The procedures used for determining how the quality of life is affected by the environment, in particular by factors such as air and solid wastes, water pollution, hazardous substa

historigrams and histogram

Post stratification adjustmen t: One of the most often used population weighting adjustments used in the complex surveys, in which weights for the elements in a class are multiplie

Graduation is the term is employed most often in the application of the actuarial statistics to denote procedures by which the set or group of observed probabilities is adjusted t

a. Explain the meaning of the word non-orthogonal. b. What condition(s) must exist for non-orthogonality to occur? Be specific.

Quasi-experiment is a term taken in use for studies which resemble experiments but are weak on some of the characteristics, particularly that allocation of the subjects to groups

This is an approach to the modelling of time-frequency surfaces which consists of a Bayesian regularization scheme in which the prior distributions over the time-frequency coeffici

5. Packages from a machine a normally distributed with a mean 200g and its standard deviation 2grams. Find the probability that a package from the machine weighs a) Less than

Kleiner Hartigan trees is a technique for displaying the multivariate data graphically as the 'trees' in which the values of the variables are coded into length of the terminal br

Lorenz curve : Essentially the graphical representation of cumulative distribution of the variable, most often used for the income. If the risks of disease are not monotonically in