Our Doctor specifies 4.16 as her expectation for the fasting blood-glucose level of a healthy elderly person. This value is suggested by previous studies on healthy young people, and the Doctor's belief that the fasting blood-glucose level is about the same for both the young and the elderly.
However, the Doctor's expectation for the two-hour blood-glucose level for a healthy elderly person is 6.25, somewhat larger than the value of about 5.5 suggested by previous studies on the young. The Doctors's expectation specifications are thus as follows.
Notice that the Doctor specifies the same expectations and covariances about
and 
as she does about 
and 
. This
is because at this stage the doctor believes herself to be quite
typical.