Author Question: Which of the following describes an experiment? a. Create differences in the explanatory variable ... (Read 18 times)

pragya sharda · **on:** Jul 24, 2018

Which of the following describes an experiment?
a. Create differences in the explanatory variable and then examine the results.
b. Observe differences in the explanatory variable and then notice whether these are related to differences in the response variable.
c. Both a) and b) are experiments.
d. Neither a) nor b) are experiments

Question 2

Give two reasons why we must sometimes use an observational study instead of an experiment.

morganmarie791 · **Reply #1 on:** Jul 24, 2018

Answer to Question 1

A

Answer to Question 2

1) IT IS UNETHICAL OR IMPOSSIBLE IN CERTAIN SITUATIONS TO ASSIGN PEOPLE TO RECEIVE A SPECIFIC TREATMENT (SUCH AS SMOKING); 2) CERTAIN EXPLANATORY VARIABLES, SUCH AS LEFT VS. RIGHT HANDEDNESS, ARE INHERENT TRAITS AND CANNOT BE RANDOMLY ASSIGNED.

MULTIPLE CHOICE QUESTIONS