Q. Dr. AB is designing a 3 x 7 factorial experiment. Which of the following is true about AB's study? (Solved)
1. Dr. AB has 21 subjects.
2. Dr. AB's study has 2 independent variables: one with 3 levels and one with 7 levels
3. Dr. AB's study has 21 independent variables.
4. Dr. AB's study has 3 independent variables: one with 3 levels, one with 7 levels, and one with 21 levels.
- b. Dr. AB's study has 2 independent variables: one with 3 levels and one with 7 levels