A Non-Parametric Method to Compare Two or More Populations, When

question 110

Short Answer

A non-parametric method to compare two or more populations, when the samples are independent and the data are either ordinal or interval but not normal, is the: $\begin{array}{|l|l|}\hline A&\text {Kruskal-Wallis test. }\\\hline B&\text {Friedman test. }\\\hline C&\text {Wilcoxon rank sum test. }\\\hline D&\text {Wil coxon signed rank sum test. }\\\hline \end{array}$

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Definitions:

Independent Variable

In an experiment, it is the variable that is manipulated or changed by the researcher to observe its effects on the dependent variable.

Random Assignment

A method used in experiments to place participants into groups in a way that each has an equal chance of being assigned to any group, minimizing biases.

Independent Variable

The variable in an experiment that is manipulated by the researcher to observe its effect on the dependent variable.

Dependent Variable

In experimental and statistical research, the variable that is being tested and measured, and is expected to change as a result of manipulations to the independent variable.