9.2.6 The British Department of Transportation studied to see if people avoid driving on Friday the 13 th . They did a traffic count on a Friday and then again on a Friday the 13 th at the same two...

9.2.6

The British Department of Transportation studied to see if people avoid driving on Friday the 13^th.   They did a traffic count on a Friday and then again on a Friday the 13^th
at 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 6^th
and the 13^th
using a 90% level.

Table #9.2.6: Traffic Count