Q. If the coefficient of determination is 0.81, the correlation coefficient __________ (Solved)
1. is 0.6561
2. could be either + 0.9 or - 0.9
3. must be positive
4. must be negative
- a. is 0.6561
1. is 0.6561
2. could be either + 0.9 or - 0.9
3. must be positive
4. must be negative