Refer to Exercise 10.3.5. Invent fictitious data sets as specified, and verify your answer by calculating appropriate estimated conditional probabilities. (Your data need not be statistically significant.)
(a) Invent a data set for which
r{DY | EY} > r{DY | EN} but
r{EY | DY} r{EN | DY}
or explain why it is not possible.
(b) Invent a data set that agrees with statement (a) of Exercise 10.3.5 but with neither (d) nor (e); or. explain why it is not possible.
(c) Invent a data set for which
r{DY | EY} > r{DY | EN} but
r{EY | DY} r{EY | DN}
or explain why it is not possible.
Exercise 10.3.5

Exposure Yes No Disease Yes No