It is of interest to know if the average time it takes police to reach the scene of an accident differs from that of an ambulance to reach the same accident. Use the summary data listed below to estimate the difference in the times (measured in minutes) between the police and the ambulance, using a 99% confidence interval. Interpret the meaning of the interval thus obtained.
Police: = 60, = 4.2, = 0.08
Ambulance: = 55, = 4.5, = 0.10

Question

It is of interest to know if the average time it takes police to reach the scene of an accident differs from that of an ambulance to reach the same accident. Use the summary data listed below to estimate the difference in the times (measured in minutes) between the police and the ambulance, using a 99% confidence interval. Interpret the meaning of the interval thus obtained.
Police:  = 60,  = 4.2,  = 0.08
Ambulance:  = 55,  = 4.5,  = 0.10

Quizplus · Accepted Answer

The Answer of It is of interest to know if the average time it takes police to reach the scene of an accident differs from that of an ambulance to reach the same accident. Use the summary data listed below to estimate the difference in the times (measured in minutes) between the police and the ambulance, using a 99% confidence interval. Interpret the meaning of the interval thus obtained.
Police:  = 60,  = 4.2,  = 0.08
Ambulance:  = 55,  = 4.5,  = 0.10

It Is of Interest to Know If the Average Time