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The document discusses the significance of sampling in research, differentiating between random and purposive sampling techniques, and their respective advantages and disadvantages. It also explains the concept of variables, categorizing them into constant, extraneous, moderating, and controlled variables, highlighting their importance in research design and analysis. Additionally, the document compares null and alternative hypotheses, emphasizing the criteria for formulating a good hypothesis.

Author

HAMID RAZA

Language

EN