10.3 Exercises

Exercise 10.1 (90th centile) Repeat the analysis in Section 10.2.6 for final height. Study the effect of omitting the interaction effect from the imputation model. Are the effects on the 90th centile the same as for the mean?

Exercise 10.2 (How many records?) Section 10.2.4 describes an application in which incomplete records are appended to create a representative sample. Develop a general strategy to determine the number of records needed to append.