The British Department of Transportation studied to see if people avoid driving on Friday the 13th. They did a traffic count on a Friday and then again on a Friday the 13that the same two locations ("Friday the 13th," 2013). The data for each location on the two different dates is in table #9.2.6. Estimate the mean difference in traffic count between the 6th and the 13th using a 90% level.
Table #9.2.6: Traffic Count- The graph will not copy and paste so these are the numbers
Dates-----------------------6th--------------------------13th
1990, July-----------------139246---------------------138548
1990, July-----------------134012---------------------132908
1991, September-------137055---------------------136018
1991, September-------133732---------------------131843
1991, December--------123552---------------------121641
1991, December--------121139---------------------118723
1992, March-------------128293----------------------125532
1992, March-------------124631----------------------120249
1992, November--------124609----------------------122770
1992, November--------117584-----------------------117263