Question: A case-control study of Hodgkin’s disease identified 85 clinically diagnosed patients with the disease (the cases). Each case was individually paired (i.e., matched) with a control from the same family, with each control being ascertained not to have Hodgkin’s disease. One of the main risk factors in the study was tonsillectomy history.

Here is the data:

Use McNemar’s test at significance level .05 to determine if there is an association of tonsillectomy history with a person having Hodgkin’s disease. Note that you should use the continuity correction form of the test, using the test statistic:

X²= (|b-c|-1)²

Provide a written conclusion of the test. Also, comment on why you think you were asked to use McNemar’s test here.