With the given data set below, formulate your research questions, hypotheses (null and alternative), variables, and their operational definition. Generate the output and present your results.

A researcher believes that alcohol intoxication even half the legal limit, that is .05 blood alcohol instead of .10, might severely impair driving ability. To test this, he subjects 10 volunteers to a driving simulation test first while sober and then after drinking sufficiently to raise the blood alcohol level to .05. The researcher measures performance as the number of simulated obstacles with which the driver collides. Thus, the higher the number, the poorer the driving.