(f) The margin of error is 9.5 and the sample mean is 137.5.O trueO false(g) In order to decrease the margin of error of a 95% confidence interval to half of what it is now, we wouldneed to double the sample size.O falseO true 4.13 Waiting at an ER, Part I: A hospital administrator hoping to improve wait times decides to estimatethe average emergency room waiting time at her hospital. She collects a simple random sample of 64patients and determines the time (in minutes) between when they checked in to the ER until they werefirst seen by a doctor. A 95% confidence interval based on this sample is (128 minutes, 147 minutes), whichis based on the normal model for the mean. Determine whether the following statements are true or false,and explain your reasoning.(a) This confidence interval is not valid since we do not know if the population distribution of the ER waittimes is nearly Normal.O trueO false(b) We are 95% confident that the average waiting time of these 64 emergency room patients is between128 and 147 minutes.O falseO true(c) We are 95% confident that the average waiting time of all patients at this hospital's emergency room isbetween 128 and 147 minutes.O falseO true(d) 95% of random samples have a sample mean between 128 and 147 minutes.O trueO false(e) A 99% confidence interval would be narrower than the 95% confidence interval since we need to bemore sure of our estimate.O falseO true

Determine whether the given statements are true or false, and explain your reasoning.

Answered: 4.13 Waiting at an ER, Part I: A…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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