(Solved):   please answer this soon Question 5 (15 marks) To combat red-light-running crashes (the phe ...

 

please answer this soon

Question 5 (15 marks) To combat red-light-running crashes (the phenomenon of a motorist entering an intersection after the traffic signal turns red and causing a crash), many states are adopting photo-red enforcement programs. In these programs, red light cameras installed at dangerous intersections photograph the license plates of vehicles that run the red light. The following table displays the number of crashes per year for 5 intersections in Virginia both before and after installation of red light cameras. Are photo-red enforcement programs effective in reducing red-light-running crash incidents at intersection? a) Construct a suitable confidence interval at a confidence level of \( 90 \% \). State your conclusion. b) Perform a suitable test at a significance level of \( 0.01 \).