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Estimate the mean difference in traffic count

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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

Reference no: EM132127945

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