(Scenario II) Suppose the Researchers Manipulated the Independent Variable Such

Multiple Choice

(Scenario II) Suppose the researchers manipulated the independent variable such that the heavy backpack was 5 pounds and the light backpack was 3 pounds. After conducting the study they saw no difference between the groups when choosing a snack. Prior to the study the researchers should have probably conducted a(n) :

A) simple experiment.
B) independent sample t-test.
C) two-group design.
D) manipulation check.