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Key words:
Dependent variable, Indepedent variable, Extraneous variable, research subject, research sample, research population, probability sampling, non-probability sampling, random sampling, systematic sampling, cluster sampling, snowball sampling, quota sampling ...
Nominal scale, ordinal scale, interval scale, pre-experimental designs, true experimental designs, quasi-experimental designs, descriptive research, correlational research ...
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| TQ | Factorial designs | |||
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Factorial design is not really a design type in itself. it is simply the addition of more variables to the other designs. There will be more than one independent variable considered and the variables may have one or many levels. | ||||