A researcher believes that alcohol intoxication might severelyimpair driving ability. To test this, she subjects 10 volunteers toa driving simulation test, first when sober, and then, afterdrinking amounts sufficient to raise their blood alcohol to .04.The researcher measures performance as the number of simulatedobstacles with which the driver collides. Thus, the higher thenumber, the poorer the driving. The data is in the Excel file inthe tab labeled Question 4. Test whether there aredifferences before and after drinking. Conduct at-test: Two-Sample for Means.
Before Drinking:
After drinking:
a. What is the null hypothesis?
b. What is the research hypothesis?
c. Why run a Two-Sample for Means t-test?
d. Interpret the findings. What are the results of thehypothesis test? Can you reject the null hypothesis?
