The higher the correlation between X and Y a. the more the ...

[brutforce]

The higher the correlation between X and Y
 
  a. the more the scatter points deviate from the regression line
  b. the more the scatter points cluster around the regression line
  c. the more the scatter points create a circular configuration
  d. none of these

Question 2

One of the fundamental requirements of all true experiments is that the
  different groups be
 
  a. equivalent at the outset.
  b. tested under at least three different conditions.
  c. matched on several covariates.
  d. none of these, since in the true experiment different groups can never be
   used.

[lorealeza]

Answer to Question 1

b

Answer to Question 2

a