Various high-risk intersections

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Reference no: EM13113395

A number of minor automobile accidents occur at various high-risk intersections. A study was done. Eight intersections were chosen at random. The number of minor accidents during a 6-month 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 0.01 significance level is it reasonable to conclude that the modification reduced the number of traffic accidents?

Reference no: EM13113395

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