Use the Myopia Study data described in Section 1.6.6 and use MYOPIC as the outcome and as possible variables for a model: AGE, GENDER, family history of myopia (MOMMY and DADMY), number of hours playing sports (SPORTHR) and number of hours watching television

(TVHR).

(a) Repeat parts 2(b)–2(h) of Exercise 2.

(b) Verify that there is little difference between the Wald-based and profile likelihood intervals for the variables in the model in part 3(a).