A number of minor automobile accidents occur at various high-risk intersections in Teton County despite 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 the lights at those intersections were modified. The numbers of minor accidents during a six-month period before and after the modifications were: Intersection # Accidents Before Modification # Accidents After Modification 4 7 3 6 5 5 3 7 7 At the .01 sigmificance level, is it reasonable to conclude that the modification reduced the number of traffic accidents? ABCDEFGH

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A number of minor automobile accidents occur at various high-risk intersections in Teton
County despite 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 the lights at those intersections were modified. The numbers of minor accidents
during a six-month period before and after the modifications were:
Intersection
# Accidents Before Modification
# Accidents After Modification
A
4
в
7
3
D
5
E
6
3
F
8
7
G
7
5
H.
At the .01 significance level, is it reasonable to conclude that the modification reduced the number of traffic
accidents?
Transcribed Image Text:A number of minor automobile accidents occur at various high-risk intersections in Teton County despite 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 the lights at those intersections were modified. The numbers of minor accidents during a six-month period before and after the modifications were: Intersection # Accidents Before Modification # Accidents After Modification A 4 в 7 3 D 5 E 6 3 F 8 7 G 7 5 H. At the .01 significance level, is it reasonable to conclude that the modification reduced the number of traffic accidents?
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