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A.Develop the table for the total population.
b.What is the crude RR and OR for the association between exposure and disease?
c.What are the stratum specific RRs and ORs for high and low levels of the third variable?
d.From the RRs and ORs, does the third variable appear to be a confounder of the association
between exposure and disease? Why?
The following population of 100,000 individuals was organized in terms of their disease and
exposure status and stratified by a third variable with two levels (high and low). Stratum (High).

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