In: Statistics and Probability
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:  | 
 10  | 
 5  | 
 12  | 
 12  | 
 3  | 
 6  | 
|
|---|---|---|---|---|---|---|---|
| 
 Friday the 13th:  | 
 14  | 
 11  | 
 15  | 
 11  | 
 5  | 
 14  | 
t=