Question options :
The type of alcohol could be a confounding variable.
It is appropriate to analyze the results using a paired sample t-test.
The experiment has two dependent variables.
The experiment has two independent variables
Answer:
It is appropriate to analyze the results using a paired sample t-test.
Step-by-step explanation:
A paired sample t test is used to measure the statistical difference in mean of two groups of observations. It is called a paired sample t test as each subject is measured twice to obtain two groups/pair of observations. This is seen in the above example where subjects take the driving simulation twice to obtain the pair of observations- one for without alcohol and the other with alcohol. paired t test is also called dependent sample t test