How would you define the hypothesis? What are the criteria that a hypothesis according to McGuigan must fulfill? According to the number of variables how are hypotheses classified? What are the differences between: research hypothesis null hypothesis and alternative hypothesis? How are the hypotheses justified? What is the difference between pure science and applied science? What are the names of the two processes for testing hypotheses and what do they consist of? What is the relationship between hypothesis verification and the operationalization of variables? How are the hypothesis and the research tool related?