Which of the following is NOT a characteristic of matched-subjects designs?
Question 1 of 40 2.5 Points In order to study causal relationships: [removed] A. the null hypothesis must not be rejected. [removed] B. external validity is essential. [removed] C. we must use a t-test or F-test. [removed] D. there must be variation of the independent variable. Question 2 of 40 2.5 Points In order […]