If both groups both improve significantly in the following alternative treatment groups design, then we should conclude that:

A) Both treatments were effective.
B) Neither treatment was effective.
C) Both treatments might be effective or ineffective because we cannot rule out some alternative explanation like history or the passage of time as a plausible cause of the improvement in both groups.
D) None of the above.

Question

If both groups both improve significantly in the following alternative treatment groups design, then we should conclude that:

A) Both treatments were effective. 
B) Neither treatment was effective. 
C) Both treatments might be effective or ineffective because we cannot rule out some alternative explanation like history or the passage of time as a plausible cause of the improvement in both groups. 
D) None of the above.

Quizplus · Accepted Answer

The Answer of If both groups both improve significantly in the following alternative treatment groups design, then we should conclude that:

A) Both treatments were effective. 
B) Neither treatment was effective. 
C) Both treatments might be effective or ineffective because we cannot rule out some alternative explanation like history or the passage of time as a plausible cause of the improvement in both groups. 
D) None of the above.

If Both Groups Both Improve Significantly in the Following Alternative