Any time a variable has been controlled, it has presumed to be ...

[Lisaclaire]

Any time a variable has been controlled, it has presumed to be
 
  a. held constant.
  b. administered only to the control group.
  c. administered only to the experimental group.
  d. all of these, depending on the experimental design.

Question 2

Artificially low correlations can occur when
 
  a. two variables are related in a non-linear way.
  b. the data represent a U-shaped function.
  c. the scatterplot illustrates a curvilinear function.
  d. All of the above are true.

[Edwyer]

Answer to Question 1

a

Answer to Question 2

d

[Lisaclaire]

TYSM

Thanks for the timely response, appreciate it