Researchers collected data on the numbers of hospital admissions resulting from motor vehicle crashes, and results are given below for Fridays on the 6th of a month and Fridays on
the following 13th of the same month. 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.
Friday the 6th:9,5,11,11,4,4
Friday the 13th:14,12,14,10,6,12
Find the value of the test statistic. t=??