To Use the Wilcoxon Rank Sum Test as a Test

question 191

Multiple Choice

To use the Wilcoxon Rank Sum Test as a test for location, we must assume that:

• A) the obtained data are either ordinal or interval where the normality requirement necessary to perform the equal-variances t-test ofis unsatisfied
• B) both samples are randomly and independently drawn from their respective populations
• C) both underlying populations from which the samples were drawn are equivalent in shape and dispersion
• D) all of these
• E) none of these

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Definitions:

Mortality Rate

A measure of the number of deaths in a particular population, scaled to the size of that population, per unit of time.

Total Death Rate

The number of deaths per year per 1,000 people in a population, which is a basic demographic indicator of the level of mortality in a community or society.

Sex Ratio

The demographic concept expressing the number of males per hundred females in a given population.

Life Expectancy

The average period that an individual is expected to live, based on statistical measures of mortality patterns.