A perfect experiment maximizes _______ variance and minimizes ...

[SO00]

A perfect experiment maximizes _______ variance and minimizes _______ variance.
 
  a. confound; error
  b. error; treatment
   c. treatment; error
  d. error; confound
  e. treatment; primary

Question 2

Researchers have discovered that children experiencing Attention Deficit Hyperactivity Disorder (ADHD) show improvements if they attend classes involving behavioral and social skills, compared to a group of ADHD children who did not attend the
 
  classes. The group of children who attended the classes constitute the
  a. experimental group.
  b. independent group.
  c. control group.
  d. placebo group.

[Rilsmarie951]

Answer to Question 1

C

Answer to Question 2

A

[SO00]

Thanks for the timely response, appreciate it

[robbielu01]

Great answer, keep it coming