The alternative hypothesis suggests that the mean of the control ...

[Pineapplelove6]

The alternative hypothesis suggests that the mean of the control and treatment groups represent different _____.
 
  a. effect sizes c. populations
  b. variables d. tasks

Question 2

How can we conclude that means of the control and treatment groups come from different populations when we believe the groups were equivalent when the experiment began? We must conclude that the difference was produced by the _____.
 
  a. statistics c. independent variable
  b. dependent variable d. controlled variables

[trog]

Answer to Question 1

C
The manipulation has changed the participants so they are no longer from the same population.

Answer to Question 2

C

[Pineapplelove6]

Excellent

[Sarahjh]

Thanks for the timely response, appreciate it