Chapter 5.12, Problem 52E

a.

To determine

Check whether the population has a normal distribution or not.

b.

To determine

Compute a 99% confidence interval on the mean differences in reaction times of drivers who have a blood-alcohol level of 0.1%.

Compute a 99% confidence interval on the median differences in reaction times of drivers who have a blood-alcohol level of 0.1%.

c.

To determine

Check whether there is significant evidence that a blood-alcohol level of 0.1% causes any increase in the mean reaction time or not.

d.

To determine

Check whether there is sufficient evidence that a blood-alcohol level of 0.1% causes any increase in the median reaction time or not.

e.

To determine

Identify whether the mean or the median appropriate measure of the reaction time differences.