A study was conducted to ascertain factors that influence a physician's decision to transfuse a patient. A sample of 49 attending physicians was selected. Each physician was asked a question concerning the frequency with which an unnecessary transfusion was give because another physician suggested it. The same question was asked of a sample of 71 residents. The data are shown in Table E6.30.
Test the null hypothesis of no association, with attention to the natural ordering of the columns. State clearly your alternative hypothesis and choice of test size.
Frequency of Unnecessary Transfusion
|
Type of Physician
|
Very Frequently (1/week)
|
Frequently (1/two weeks)
|
Occasionally (1/month)
|
Rarely (1/two months)
|
Never
|
|
Attending
|
1
|
1
|
3
|
31
|
13
|
|
Resident
|
2
|
13
|
28
|
23
|
5
|