# An auto dealer would like to determine if there is a difference in the braking distance

An auto dealer would like to determine if there is a difference in the braking distance (the number of feet required to go from 60mph to 0mph) of two different models of a high-end sedan. Six drivers are randomly selected and asked to drive both models and brake once they have reached exactly 60mph. The distance required to come to a complete halt is then measured in feet. The results of the test are as follows. Can the auto dealer conclude that there is a significant difference in the braking distances of the two models? Use α=0.01. Let the braking distances of Model A represent Population 1 and the braking distances of Model B represent Population 2.

Braking Distance of High-End Sedans (Feet)

Driver 1 2 3 4 5 6

Model A 156 149 148 151 150 154

Model B 158 153 149 152 150 155

a. State the null and alternative hypotheses for the test. Fill in the blank below.

b. Compute the value of the test statistic. Round your answer to three decimal places.

c. Make the decision and state the conclusion in terms of the original question.

d.