Question: 4. Distinguish between the following: a. Internal validity and external validity. b. Pre-experimental design and quasi-experimental design. c. History and maturation. d. Random sampling, randomization,

4. Distinguish between the following: a. Internal validity and external validity. b. Pre-experimental design and quasi-experimental design. c. History and maturation. d. Random sampling, randomization, and matching. e. Environmental variables and extraneous variables.

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