A hospital would like to determine whether there is a

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A hospital would like to determine whether there is a relationship between the level of satisfaction of workers with working conditions and their job category.  A random sample of 250 employees was surveyed.  The results are summarized in the table below.  

                                                  
       

Nurses

  
  

Support Staff

  
  

Doctors

  
  

Total

  
  

Satisfactory

  
  

40

  
  

80

  
  

20

  
  

140

  
  

Indifferent

  
  

20

  
  

40

  
  

20

  
  

80

  
  

Poor

  
  

15

  
  

5

  
  

10

  
  

30

  
  

Total

  
  

75

  
  

125

  
  

50

  
  

250

  

i. Find a 98% confidence interval for the true proportion of all workers that are satisfied with working conditions?                                  

ii. Is there sufficient evidence that support staff are more satisfied with working conditions than are nursing staff?  Use a level of significancea=.10.

Reference no: EM13603388

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