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A number of minor automobile accidents occur at various high-risk intersections in York county despite the...

A number of minor automobile accidents occur at various high-risk intersections in York county despite the traffic lights. The traffic department claims that a modification in the type of light will reduce these accidents. The county commissioners have agreed to a proposed experiment. Eight intersections were chosen at random, and lights at those intersections were modified. The number of minor accidents during a six-months periods 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 .01 significance level, it is reasonable to conclude that the modifications reduced the number of traffic accidents?

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milcah answered 2 years ago
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