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Sixty students were randomly divided into two groups as part of a study ono the effects
of alcohol on reaction time. Each member of one group consumed a specified amount of alcohol and members of the other group had a non-alcoholic beverage. The reaction time of both groups were measured before and after taking the beverage/alcoholic drink.
_______1. What is the independent variable?
a. amount of alcohol
b. reaction time
c. one student
d. sixty students
_______2. What is the dependent variable?
a. amount of alcohol
b. reaction time
c. one student
d. sixty students
_______3. What is the experimental unit?
a. amount of alcohol
b. reaction time
c. one student
d. sixty students
_______4. Which of the following is/are potential extraneous variable/s in this study?
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