The appropriate statistical test to evaluate the difference ...

[bobbysung]

The appropriate statistical test to evaluate the difference between the means of two groups
  formed with random assignment is the
 
  A) two-way ANOVA for independent groups
  B) t test for independent samples
  C) factorial ANOVA for independent groups
  D) t test for correlated samples

Question 2

When a nonequivalent control group design is used, researchers run the risk that the groups were not equivalent at the beginning of the study. This is called
 
  a. maturation
  b. regression to the mean
  c. selection bias
  d. quasi-randomization
  e. pretest-posttest contamination

[tuwy]

Answer to Question 1

B

Answer to Question 2

c