As the difference between groups in an experiment grow larger, ...

[ARLKQ]

As the difference between groups in an experiment grow larger, the inferential statistic resulting
  from a test of this difference becomes
 
  A) smaller B) confounded C) larger D) correlated

Question 2

In an experiment testing the effects of a drug on rats' learning using 0, 5, 10, or 15 milligrams of a
  drug, How many levels or treatment conditions would there be in the study?
 
  A) 1 B) 2 C) 3 D) 4

[dpost18]

Answer to Question 1

C

Answer to Question 2

D