Whenever the repeated-measures design is used a. the same ...

[big1devin]

Whenever the repeated-measures design is used
 
  a. the same subjects are used as their own controls
  b. there should be a positive correlation between the pre and post scores
  c. the researcher is using the post-facto method
  d. both a and b, but not c

Question 2

The mean of the distribution of differences becomes zero only when all
  sample pairs represent different populations.
 
  Indicate whether the statement is true or false

[Ddddd]

Answer to Question 1

d

Answer to Question 2

F

[big1devin]

Thanks for the timely response, appreciate it

[patma1981]

Gracias!