Hypothesis: A hypothesis is a testable prediction or explanation that guides research studies. It is an educated guess about the relationship between variables.
Experimental Design: Experimental design refers to the plan or blueprint of how a research study will be conducted, including the selection of participants, manipulation of variables, and control conditions.
Sampling: Sampling involves selecting a subset of individuals from a larger population to participate in a research study. It helps researchers make inferences about the population based on the sample data collected.