Answered: Estimate the difference in the times…

Name: It is of interest to know if the average time it takes police to reach
Uploaded: 2024-03-20T07:07:12.000Z
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Description: 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. Estimate the difference in the times between the police and the ambulance (mean time for pol

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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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. Estimate the difference in the times between the police and the ambulance (mean time for police - mean time for ambulance) using a 99% confidence interval. Based on the confidence interval constructed, do the data support the claim that it takes the same amount of time for the police and the ambulance to reach the scene of an accident?

Summary data are as follows:

	sample size	sample mean	sample variance
Police	60	4.2 minutes	0.08
Ambulance	55	4.5 minutes	0.10

Group of answer choices

A. 99% C.I. is (-0.445, -0.155). The sample supports that the times differ.

B. 99% C.I. is (-1.070, 0.471). The sample does not supports that the times differ.

C. 99% C.I. is (-0.445, -0.155). The sample does not support that the times differ.

D. 99% C.I. is (-1.070, 0.471). The sample supports that the times differ.

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