A number of minor automobile accidents occur at various high-risk intersections in Jackson despite traffic lights....

A number of minor automobile accidents occur at various high-risk intersections in Jackson despite traffic lights. The police department claims that a modification in the type of lights will reduce these accidents. The city commissioners have agreed to a proposed improvement experiment. Eight intersections were chosen at random and the lights at those intersections were modified. The number of minor accidents during a six months period before and after the modifications were:

Number of Accidents

A B C D E F G H

Before Modification 5 7 6 4 8 9 8 10

After Modification 3 7 7 0 4 6 8 2

At the .05 significance level is it reasonable to conclude that the modification made any difference in the number of traffic accidents? Must use the five steps Test Hypothesis.

Expert Solution

orchestra answered 2 years ago

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