Question: (a) Briefly define internal and external validity. (b) Discuss the trade-offs that must be made in experimental design formulation when trying to obtain realistic amounts

(a) Briefly define internal and external validity.

(a) Briefly define internal and external

(b) Discuss the trade-offs that must be made in experimental design formulation when trying to obtain realistic amounts of internal and external validity.

3) (a) Briefly define internal and external validity (b) Discuss the trade-offs that must be made in experimental design formulation when trying to obtain realistic amounts of internal and external validity (15 marks)

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