Investigators conducted a case control study to determine if there was an association between asthma symptoms and exposure to dust (dust or no dust)....

Investigators conducted a case control study to determine if there was an association between asthma symptoms and exposure to dust (dust or no dust). They collected information from 62 matched pairs of cases (those experiencing asthma symptoms) and controls (those not experiencing asthma symptoms). They entered their observed counts in SAS using the code below:

data study;