Researchers can make causal inferences for main effects tested ...

[naturalchemist]

Researchers can make causal inferences for main effects tested with __________ strategies, but not for main effects tested with __________ strategies.
 
  a. computerized statistical; hand-calculated statistical
  b. experimental; nonexperimental
  c. nonexperimental; experimental
  d. nonparametric; parametric

Question 2

In examining main effects in a factorial design, researchers pool the data across the levels of one independent variable and observe the effects of the other independent variable.
 
  The researcher then examines the __________ to test for a possible main effect.
 
   a. marginal means
   b. interaction
   c. cell values in the matrix
   d. Chi-square test

[rnehls]

Answer to Question 1

b

Answer to Question 2

a

[naturalchemist]

Wow, this really help

[chereeb]

Thanks for the timely response, appreciate it