Refer to the given paired sample data and use the Wilcoxon signed-ranks test to test the claim that the matched pairs have differences that come from a population with a median equal to zero. Is...

Refer to the given paired sample data and use the Wilcoxon signed-ranks test to test the claim that

the matched pairs have differences that come from a population with a median equal to zero.

Is Friday the 13th Unlucky?
Researchers collected data on the numbers of hospital admissions resulting from motor vehicle crashes. The results given below are for Fridays on the 6th of a month and Fridays on the 13th of the same month (based on data from “Is Friday the 13th Bad for Your Health?” by Scanlon, et al., BMJ, Vol. 307, as listed in the Data and Story Line online resource of data sets). Use a 0.05 significance level 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.