Question

to hap Data on the numbers of hospital admissions resulting from motor vehicle crashes are given below for Fridays on the 6th of a month and Fridays on the folowing 13th of the same month. Assume that the paired sample data is a simple random sample and that the differences have a distribution that is approximately normal. Constructa 95% confidence interval estimate of the mean of the population of differences between hospital admissions. Use the confidence interval to test the claim that when the 13th day of a month falls on a Friday, the numbers of hospital admissions from motor vehicle crashes are not affected. Friday the 6th Friday the 13th 11 In this example, He is the mean value of the differences d for the population of all pairs of data, where each individual difference d is defined as the number of hospital admissions on Friday the 6th minus the number of hospital admissions on Friday the 13th. Find the 96% confidence interval < < (Round to two decimal places as needed.) Enter your answer in the edit fields and then click Check Answer. part 1 remaining Clear All Check Answer

Answer 1

Ans: the differences are, -3,-8, 8, -7, -5 n=5, ã = -6.2 So = 2.168 Confidence Inselval - azte (5/5) te = toos,4 = 2.132 - 95% Confidence Inselval = -6.27 2.132/2.168 = -6.2 + 2.067 =(-8.27, +4.13) Therefore, [-2.27€ M <-4.13)