John Isaac, Inc., a designer and installer of industrial signs, employs 60 people ...

     John   Isaac, Inc., a designer and installer of industrial signs, employs 60 people.   The company recorded the type of the most recent visit to a doctor by each   employee. A national assessment conducted in 2008 found that 53 percent of   all physician visits were to primary care physicians, 19 percent to medical   specialists, 17 percent to surgical specialists and 11 percent percent   to emergency departments. Test at the 0.01 significance level if Isaac   employees differ significantly from the survey distribution. Here are their   results: Primary care 29, medical specialist 11, surgical specialist 16,   emergency 4.