One way of providing some control in ex post facto research is ...

[anshika]

One way of providing some control in ex post facto research is
 
  a. to use analysis of covariance.
  b. to do a pilot study before carrying out the main research.
  c. to match the subjects of the groups to be compared on as many extraneous variables as possible.
  d. a and b
  e. a and c

Question 2

Choose the term that is described in each of the phrases below. Removes the part of each subject's posttest score that is in common with his/her pretest score.
 
  a. random assignment
  b. randomized matching
  c. homogeneous selection
  d. analysis of covariance
  e. use of subjects as their own controls

[amynguyen1221]

Answer to Question 1

E

Answer to Question 2

D