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I'm stuck, can someone explain why each of these hypotheses are worded wrongly and problematic?

- As the number of red-light cameras has increased, the number of accidents has dropped.

- As Montgomery county has installed cameras at intersections, the number of fatalities has dropped.

- The more red-light cameras there are, the fewer traffic accidents occur.

- The more red-light cameras that Montgomery County installs, the fewer traffic citations.

- The more red-light cameras a city installs, the fewer the number of fatalities due to less red-light running in the city.

- The more red-light cameras a city installs, the fewer traffic citations and fatalities in the city.

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