Fireworks and Injuries These data were obtained for the years  1993  through  1998  and indicate the number of fireworks (in millions) used and the related injuries. Fireworks in use  x Related injuries  y 67.6 12,100 87.1 12,600 117 12,500 115 10,900 118 7800 Test the hypotheses at  a=0.01 critical value = ?

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