13.11 Implement the EM algorithm for the data in Table 13.5 with values superscripted

a, b and

c, d in the supplemental margins interchanged.

Compare theMLestimateof the odds ratio????11????22????−1 12 ????−1 21 with the estimate from complete units. Are they identical?

328 13 Models for Partially Classified Contingency Tables, Ignoring theMissingness Mechanism 13.12 Show that in Example 13.10 the parameters in the factored likelihood are distinct for models {SP, SC, PC} and {SP, SC}, but are not distinct for {SC, PC}.